diff --git a/source/ConsoleApplication.cc b/source/ConsoleApplication.cc
index f746b94..c86dc6d 100644
--- a/source/ConsoleApplication.cc
+++ b/source/ConsoleApplication.cc
@@ -771,6 +771,128 @@ error:
 	return result;
 }
 
+int  InjectDllAndStartHttpByPid(unsigned int pid, wchar_t* szDllPath, DWORD port)
+{
+	if(!EnableDebugPrivilege()){
+		return 0;
+	}
+	int result = 0;
+	HANDLE hRemoteThread = NULL;
+	LPTHREAD_START_ROUTINE lpSysLibAddr = NULL;
+	HINSTANCE__* hKernelModule = NULL;
+	LPVOID lpRemoteDllBase = NULL;
+	HANDLE hProcess;
+	size_t ulDllLength;
+	wchar_t* dllName = (wchar_t*)L"wxhelper.dll";
+	size_t dllNameLen = wcslen(dllName) * 2 + 2;
+	char* funcName = (char* )"http_start";
+	size_t funcNameLen = strlen(funcName) + 1;
+
+	HANDLE  hStartHttp = NULL;
+	LPVOID portAddr = NULL;
+	HANDLE  getProcThread = NULL;
+
+	LPVOID paramsAddr = NULL;
+	LPVOID param1Addr = NULL;
+	LPVOID param2Addr = NULL;
+	LPVOID  GetProcFuncAddr = NULL;
+
+	DWORD params[2] = { 0 };
+
+	ulDllLength = (wcslen(szDllPath) + 1) * sizeof(wchar_t);
+	hProcess = OpenProcess(PROCESS_ALL_ACCESS, false, pid);
+	if (!hProcess) {
+		goto error;
+	}
+
+	lpRemoteDllBase = VirtualAllocEx(hProcess, NULL, ulDllLength, MEM_COMMIT, PAGE_READWRITE);
+	if (lpRemoteDllBase)
+	{
+		if (WriteProcessMemory(hProcess, lpRemoteDllBase, szDllPath, ulDllLength, NULL)
+			&& (hKernelModule = GetModuleHandleW(L"kernel32.dll")) != 0
+			&& (lpSysLibAddr = (LPTHREAD_START_ROUTINE)GetProcAddress(hKernelModule, "LoadLibraryW")) != 0
+			&& (hRemoteThread = CreateRemoteThread(hProcess, NULL, 0, lpSysLibAddr, lpRemoteDllBase, 0, NULL)) != 0)
+		{
+			WaitForSingleObject(hRemoteThread, INFINITE);
+			GetProcFuncAddr = FillAsmCode(hProcess);
+			param1Addr = VirtualAllocEx(hProcess, NULL, dllNameLen, MEM_COMMIT, PAGE_READWRITE);
+			if (param1Addr) {
+				SIZE_T dwWriteSize;
+				BOOL  bRet = WriteProcessMemory(hProcess, (LPVOID)param1Addr, dllName, dllNameLen, &dwWriteSize);
+				if (!bRet) {
+					goto error;
+				}
+			}
+			param2Addr = VirtualAllocEx(hProcess, NULL, funcNameLen, MEM_COMMIT, PAGE_READWRITE);
+			if (param2Addr) {
+				SIZE_T dwWriteSize;
+				BOOL  bRet = WriteProcessMemory(hProcess, (LPVOID)param2Addr, funcName, funcNameLen, &dwWriteSize);
+				if (!bRet) {
+					goto error;
+				}
+			}
+
+			params[0] = (DWORD)param1Addr;
+			params[1] = (DWORD)param2Addr;
+
+			paramsAddr = VirtualAllocEx(hProcess, NULL, sizeof(params), MEM_COMMIT, PAGE_READWRITE);
+			if (paramsAddr) {
+				SIZE_T dwWriteSize;
+				BOOL  bRet = WriteProcessMemory(hProcess, (LPVOID)paramsAddr, &params[0], sizeof(params), &dwWriteSize);
+				if (!bRet) {
+					goto error;
+				}
+			}
+
+			DWORD dwRet = 0;
+			getProcThread = CreateRemoteThread(hProcess, NULL, 0, (LPTHREAD_START_ROUTINE)GetProcFuncAddr, paramsAddr, 0, NULL);
+
+			if (getProcThread)
+			{
+				WaitForSingleObject(getProcThread, INFINITE);
+				GetExitCodeThread(getProcThread, &dwRet);
+				if (dwRet) {
+					hStartHttp = CreateRemoteThread(hProcess, NULL, 0, (LPTHREAD_START_ROUTINE)dwRet, (LPVOID)port, 0, NULL);
+					WaitForSingleObject(hStartHttp, INFINITE);
+					result = 1;
+				}
+			}
+		}
+	}
+error:
+	if (hRemoteThread) {
+		CloseHandle(hRemoteThread);
+	}
+	if (getProcThread) {
+		CloseHandle(getProcThread);
+	}
+	if (hStartHttp) {
+		CloseHandle(hStartHttp);
+	}
+
+	if (lpRemoteDllBase) {
+		VirtualFreeEx(hProcess, lpRemoteDllBase, ulDllLength, MEM_DECOMMIT | MEM_RELEASE);
+	}
+	if (param1Addr) {
+		VirtualFreeEx(hProcess, param1Addr, dllNameLen, MEM_DECOMMIT | MEM_RELEASE);
+	}
+
+	if (param2Addr) {
+		VirtualFreeEx(hProcess, param1Addr, funcNameLen, MEM_DECOMMIT | MEM_RELEASE);
+	}
+
+	if (paramsAddr) {
+		VirtualFreeEx(hProcess, param1Addr, sizeof(params), MEM_DECOMMIT | MEM_RELEASE);
+	}
+
+	if (GetProcFuncAddr) {
+		VirtualFreeEx(hProcess, GetProcFuncAddr, sizeof(GetProcAddressAsmCode), MEM_DECOMMIT | MEM_RELEASE);
+	}
+
+	CloseHandle(hProcess);
+	return result;
+}
+
 int  InjectDll(wchar_t* szPName, wchar_t* szDllPath)
 {
 	if(!EnableDebugPrivilege()){
@@ -825,6 +947,58 @@ int  InjectDll(wchar_t* szPName, wchar_t* szDllPath)
 	return result;
 }
 
+int  InjectDllByPid(unsigned int pid, wchar_t* szDllPath)
+{
+	if(!EnableDebugPrivilege()){
+		return 0;
+	}
+	int result = 0;
+	HANDLE hRemoteThread;
+	LPTHREAD_START_ROUTINE lpSysLibAddr;
+	HINSTANCE__* hKernelModule;
+	LPVOID lpRemoteDllBase;
+	HANDLE hProcess;
+	size_t ulDllLength;
+
+	ulDllLength = (wcslen(szDllPath) + 1) * sizeof(wchar_t);
+	hProcess = OpenProcess(PROCESS_ALL_ACCESS, false, pid);
+	if (!hProcess) {
+		return 0;
+	}
+
+	lpRemoteDllBase = VirtualAllocEx(hProcess, NULL, ulDllLength, MEM_COMMIT, PAGE_READWRITE);
+	if (lpRemoteDllBase)
+	{
+		if (WriteProcessMemory(hProcess, lpRemoteDllBase, szDllPath, ulDllLength, NULL)
+			&& (hKernelModule = GetModuleHandleW(L"kernel32.dll")) != 0
+			&& (lpSysLibAddr = (LPTHREAD_START_ROUTINE)GetProcAddress(hKernelModule, "LoadLibraryW")) != 0
+			&& (hRemoteThread = CreateRemoteThread(hProcess, NULL, 0, lpSysLibAddr, lpRemoteDllBase, 0, NULL)) != 0)
+		{
+			WaitForSingleObject(hRemoteThread, INFINITE);
+			VirtualFreeEx(hProcess, lpRemoteDllBase, ulDllLength, MEM_DECOMMIT | MEM_RELEASE);
+			CloseHandle(hRemoteThread);
+			CloseHandle(hProcess);
+			OutputDebugStringA("[DBG] dll inject success");
+			printf("dll inject success");
+			printf("dll path : %s ", szDllPath);
+			printf("pid : %d ", pid);
+			result = 1;
+		}
+		else
+		{
+			VirtualFreeEx(hProcess, lpRemoteDllBase, ulDllLength, MEM_DECOMMIT | MEM_RELEASE);
+			CloseHandle(hProcess);
+			result = 0;
+		}
+	}
+	else
+	{
+		CloseHandle(hProcess);
+		result = 0;
+	}
+	return result;
+}
+
 int  UnInjectDll(wchar_t* szPName, wchar_t* szDName)
 {
 	HMODULE  hDll;
@@ -878,8 +1052,9 @@ int main(int argc, char** argv)
 	int port = 0;
 
 	ULONG pid = 0;
+	unsigned int injectPid =0;
 
-	while ((param = getopt(argc, argv, "i:p:u:d:m:P:h")) != -1)
+	while ((param = getopt(argc, argv, "i:p:u:d:m:P:I:h")) != -1)
 	{
 		switch (param)
 		{
@@ -916,6 +1091,9 @@ int main(int argc, char** argv)
 		case 'P':
 			port = std::atoi(optarg);
 			break;
+		case 'I':
+			injectPid = std::atoi(optarg);
+			break;
 		default:
 			abort();
 			break;
@@ -925,6 +1103,24 @@ int main(int argc, char** argv)
 	if (pid) {
 		FindHandles(pid, (LPSTR)"_WeChat_App_Instance_Identity_Mutex_Name", TRUE, TRUE);
 	}
+	if (injectPid != 0 && cDllPath[0] != 0)
+	{
+		if(cDllPath[0] != '\0')
+		{
+			if (port == 0) {
+				std::wstring wsPath = Utf8ToUnicode(cDllPath);
+				int ret = InjectDllByPid(injectPid, (wchar_t*)wsPath.c_str());
+				printf(" 注入结果：%i \n", ret);
+			}
+			else
+			{
+				std::wstring wsPath = Utf8ToUnicode(cDllPath);
+				int ret = InjectDllAndStartHttpByPid(injectPid, (wchar_t*)wsPath.c_str(), port);
+				printf(" 注入结果：%i \n", ret);
+			}
+		}
+	}
+	
 
 	if (cInjectprogram[0] != 0 && cDllPath[0] != 0)
 	{
diff --git a/src/config.cc b/src/config.cc
index 2f86227..171ff88 100644
--- a/src/config.cc
+++ b/src/config.cc
@@ -1,6 +1,17 @@
-#include "config.h"
+#include "pch.h"
+#include "config.h"
+
 namespace wxhelper {
 Config::Config(/* args */) {}
 
 Config::~Config() {}
-}  // namespace wxhelper
\ No newline at end of file
+
+
+void Config::Initialize(){
+    port_ = GetPrivateProfileInt("config", "Port", 19088, "./config.ini");
+}
+int  Config::GetPort(){
+    return port_;
+}
+
+ } // namespace wxhelper
\ No newline at end of file
diff --git a/src/config.h b/src/config.h
index 5df279e..ffde254 100644
--- a/src/config.h
+++ b/src/config.h
@@ -1,15 +1,17 @@
-#ifndef  WXHELPER_CONFIG_H_
+#ifndef WXHELPER_CONFIG_H_
 #define WXHELPER_CONFIG_H_
 
-namespace wxhelper{
+namespace wxhelper {
 
-    class Config
-    {
-    private:
-        /* data */
-    public:
-        Config(/* args */);
-        ~Config();
-    };
-}
+class Config {
+ public:
+  Config(/* args */);
+  ~Config();
+  void Initialize();
+  int  GetPort();
+
+ private:
+  int port_;
+};
+}  // namespace wxhelper
 #endif
\ No newline at end of file
diff --git a/src/db.cc b/src/db.cc
index 1737688..4c64ef7 100644
--- a/src/db.cc
+++ b/src/db.cc
@@ -5,6 +5,7 @@
 #include "easylogging++.h"
 
 #include "wechat_function.h"
+#include "utils.h"
 using namespace std;
 
 namespace wxhelper {
@@ -117,8 +118,16 @@ int DB::Select(DWORD db_hanle, const char *sql,
     vector<string> item;
     for (size_t i = 0; i < it.size(); i++) {
       if (!it[i].is_blob) {
-        string content(it[i].content);
-        item.push_back(content);
+        bool is_utf8 = Utils::IsTextUtf8(it[i].content, it[i].content_len);
+        if (is_utf8) {
+          string content(it[i].content);
+          item.push_back(content);
+        } else {
+          string base64_str =
+              base64_encode((BYTE *)it[i].content, it[i].content_len);
+          item.push_back(base64_str);
+        }
+
       } else {
         string b64_str =
             base64_encode((BYTE *)it[i].content, it[i].content_len);
diff --git a/src/global_context.cc b/src/global_context.cc
index 909973d..c711671 100644
--- a/src/global_context.cc
+++ b/src/global_context.cc
@@ -11,14 +11,15 @@ void GlobalContext::initialize(HMODULE module) {
   module_ = module;
   DWORD base = Utils::GetWeChatWinBase();
   config.emplace();
+  config->Initialize();
   log.emplace();
-  log->initialize();
+  log->Initialize();
   hide_module.emplace();
   #ifndef _DEBUG
   hide_module->Hide(module_);
   #endif
 
-  HttpServer::GetInstance().Init(19088);
+  HttpServer::GetInstance().Init(config->GetPort());
   HttpServer::GetInstance().HttpStart();
   DB::GetInstance().init(base);
   contact_mgr.emplace(ContactMgr{base});
diff --git a/src/http_handler.cc b/src/http_handler.cc
index 1b94fdc..8450ca6 100644
--- a/src/http_handler.cc
+++ b/src/http_handler.cc
@@ -131,7 +131,6 @@ string Dispatch(struct mg_connection *c, struct mg_http_message *hm) {
       break;
     }
     case WECHAT_MSG_SEND_AT: {
-      break;
       wstring chat_room_id = GetWStringParam(j_param, "chatRoomId");
       vector<wstring> wxids = getArrayParam(j_param, "wxids");
       wstring msg = GetWStringParam(j_param, "msg");
@@ -502,11 +501,11 @@ string Dispatch(struct mg_connection *c, struct mg_http_message *hm) {
       break;
     }
     case WECHAT_DO_OCR: {
-      // wstring image_path = GetWStringParam(j_param, "imagePath");
-      // string text("");
-      // int success = g_context.misc_mgr->DoOCRTask(WS2LPWS(image_path), text);
-      // json ret_data = {{"code", success}, {"result", "OK"}, {"text", text}};
-      // ret = ret_data.dump();
+      wstring image_path = GetWStringParam(j_param, "imagePath");
+      string text("");
+      int success = g_context.misc_mgr->DoOCRTask(WS2LPWS(image_path), text);
+      json ret_data = {{"code", success}, {"result", "OK"}, {"text", text}};
+      ret = ret_data.dump();
       break;
     }
     case WECHAT_SEND_PAT_MSG: {
@@ -589,7 +588,7 @@ void HttpHandler::HandlerRequest(struct mg_connection *c, void *ev_data) {
       ret = res.dump();
     }
     if (ret != "") {
-      mg_http_reply(c, 200, "", ret.c_str(), 0, 0);
+      mg_http_reply(c, 200, "Content-Type: application/json\r\n", "%s\n", ret.c_str());
     }
   } else {
     mg_http_reply(c, 500, NULL, "%s", "Invalid URI");
diff --git a/src/log.cc b/src/log.cc
index 77841a8..c955235 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -7,7 +7,7 @@ Log::Log(/* args */) {}
 
 Log::~Log() {}
 
-void Log::initialize() {
+void Log::Initialize() {
 
   el::Configurations conf;
   // 启用日志
diff --git a/src/log.h b/src/log.h
index ebca51a..9718263 100644
--- a/src/log.h
+++ b/src/log.h
@@ -8,7 +8,7 @@ namespace wxhelper{
     public:
         Log(/* args */);
         ~Log();
-         void initialize();
+        void Initialize();
     };
     
 
diff --git a/src/misc_mgr.cc b/src/misc_mgr.cc
index 3aa02b9..8462307 100644
--- a/src/misc_mgr.cc
+++ b/src/misc_mgr.cc
@@ -90,7 +90,7 @@ int MiscMgr::DoOCRTask(wchar_t *img_path, std::string &result) {
     for (unsigned int i = 0; i < num - 1; i++) {
       DWORD content = *(DWORD *)header;
       result += Utils::WstringToUTF8(READ_WSTRING(content, 0x14));
-
+      result += "\r\n";
       header = content;
     }
   }
diff --git a/src/send_message_mgr.cc b/src/send_message_mgr.cc
index 7a9b38e..ec71383 100644
--- a/src/send_message_mgr.cc
+++ b/src/send_message_mgr.cc
@@ -5,6 +5,7 @@
 
 #include "wechat_function.h"
 #include "db.h"
+#include "contact_mgr.h"
 
 namespace wxhelper {
 SendMessageMgr::SendMessageMgr(DWORD base):BaseMgr(base) {}
@@ -14,10 +15,9 @@ int SendMessageMgr::SendText(wchar_t* wxid, wchar_t* msg) {
   WeChatString to_user(wxid);
   WeChatString text_msg(msg);
   wchar_t** msg_pptr = &text_msg.ptr;
-  DWORD base = Utils::GetWeChatWinBase();
-  DWORD send_message_mgr_addr = base + WX_SEND_MESSAGE_MGR_OFFSET;
-  DWORD send_text_msg_addr = base + WX_SEND_TEXT_OFFSET;
-  DWORD free_chat_msg_addr = base + WX_FREE_CHAT_MSG_OFFSET;
+  DWORD send_message_mgr_addr = base_addr_ + WX_SEND_MESSAGE_MGR_OFFSET;
+  DWORD send_text_msg_addr = base_addr_ + WX_SEND_TEXT_OFFSET;
+  DWORD free_chat_msg_addr = base_addr_ + WX_FREE_CHAT_MSG_OFFSET;
   char chat_msg[0x2D8] = {0};
   __asm {
       PUSHAD
@@ -44,6 +44,67 @@ int SendMessageMgr::SendText(wchar_t* wxid, wchar_t* msg) {
 int SendMessageMgr::SendAtText(wchar_t* chat_room_id, wchar_t** wxids, int len,
                                wchar_t* msg) {
   int success = -1;
+  WeChatString  * at_users = new WeChatString[len+1];
+  std::wstring at_msg = L"";
+  int number =0;
+  for (int i = 0; i < len; i++) {
+    std::wstring nickname;
+    if (!lstrcmpiW((wchar_t *)wxids[i], (wchar_t *)L"notify@all")) {
+      nickname = L"所有人";
+    } else {
+      ContactMgr contact{base_addr_};
+      nickname = contact.GetContactOrChatRoomNickname(wxids[i]);
+    }
+    if (nickname.length() == 0) {
+      continue;
+    }
+
+    WeChatString temp = {0};
+    temp.ptr = (wchar_t *)wxids[i];
+    temp.length = wcslen((wchar_t *)wxids[i]);
+    temp.max_length = wcslen((wchar_t *)wxids[i]) * 2;
+    memcpy(&at_users[number], &temp, sizeof(WeChatString));
+    at_msg = at_msg + L"@" + nickname + L" ";
+    number++;
+  }
+  if (number < 1){
+    return success;
+  }
+  std::wstring origin(msg);
+  at_msg += origin;
+  AtInner at_list = {0};
+  at_list.start = (DWORD)at_users;
+  at_list.finsh = (DWORD)&at_users[number];
+  at_list.end = (DWORD)&at_users[number];
+  WeChatString to_user(chat_room_id);
+  WeChatString text_msg((wchar_t *)at_msg.c_str());
+  wchar_t **msg_pptr = &text_msg.ptr;
+  
+  DWORD send_message_mgr_addr = base_addr_ + WX_SEND_MESSAGE_MGR_OFFSET;
+  DWORD send_text_msg_addr = base_addr_ + WX_SEND_TEXT_OFFSET;
+  DWORD free_chat_msg_addr = base_addr_ + WX_FREE_CHAT_MSG_OFFSET;
+  char chat_msg[0x2D8] = {0};
+  __asm{
+      PUSHAD
+      CALL       send_message_mgr_addr
+      PUSH       0x0
+      PUSH       0x0
+      PUSH       0x0
+      PUSH       0x1
+      LEA        EAX,at_list
+      PUSH       EAX
+      MOV        EAX,msg_pptr
+      PUSH       EAX
+      LEA        EDX,to_user
+      LEA        ECX,chat_msg
+      CALL       send_text_msg_addr 
+      MOV        success,EAX
+      ADD        ESP,0x18
+      LEA        ECX,chat_msg        
+      CALL       free_chat_msg_addr
+      POPAD
+  }
+  LOG_IF((success == -1), ERROR) << "SendText fail";
   return success;
 }
 int SendMessageMgr::SendImage(wchar_t* wxid, wchar_t* image_path) {
@@ -51,11 +112,10 @@ int SendMessageMgr::SendImage(wchar_t* wxid, wchar_t* image_path) {
   WeChatString to_user(wxid);
   WeChatString path(image_path);
   char chat_msg[0x2D8] = {0};
-  DWORD base = Utils::GetWeChatWinBase();
-  DWORD send_message_mgr_addr = base + WX_SEND_MESSAGE_MGR_OFFSET;
-  DWORD init_chat_msg_addr = base + WX_INIT_CHAT_MSG_OFFSET;
-  DWORD send_image_msg_addr = base + WX_SEND_IMAGE_OFFSET;
-  DWORD free_msg_addr = base + WX_FREE_CHAT_MSG_OFFSET;
+  DWORD send_message_mgr_addr = base_addr_ + WX_SEND_MESSAGE_MGR_OFFSET;
+  DWORD init_chat_msg_addr = base_addr_ + WX_INIT_CHAT_MSG_OFFSET;
+  DWORD send_image_msg_addr = base_addr_ + WX_SEND_IMAGE_OFFSET;
+  DWORD free_msg_addr = base_addr_ + WX_FREE_CHAT_MSG_OFFSET;
   DWORD temp = 0;
   WeChatString null_obj = {0};
   __asm {
@@ -88,11 +148,10 @@ int SendMessageMgr::SendFile(wchar_t* wxid, wchar_t* file_path) {
   WeChatString to_user(wxid);
   WeChatString path(file_path);
   char chat_msg[0x2D8] = {0};
-  DWORD base = Utils::GetWeChatWinBase();
-  DWORD app_msg_mgr_addr = base + WX_APP_MSG_MGR_OFFSET;
-  DWORD init_chat_msg_addr = base + WX_INIT_CHAT_MSG_OFFSET;
-  DWORD send_file_addr = base + WX_SEND_FILE_OFFSET;
-  DWORD free_msg_addr = base + WX_FREE_CHAT_MSG_OFFSET;
+  DWORD app_msg_mgr_addr = base_addr_ + WX_APP_MSG_MGR_OFFSET;
+  DWORD init_chat_msg_addr = base_addr_ + WX_INIT_CHAT_MSG_OFFSET;
+  DWORD send_file_addr = base_addr_ + WX_SEND_FILE_OFFSET;
+  DWORD free_msg_addr = base_addr_ + WX_FREE_CHAT_MSG_OFFSET;
   DWORD temp = 0;
   WeChatString null_obj = {0};
   __asm {
@@ -150,9 +209,8 @@ int SendMessageMgr::ForwardMsg(wchar_t* wxid, unsigned long long msgid) {
 
   if (localid == 0) return 0;
   WeChatString to_user(wxid);
-  DWORD base = Utils::GetWeChatWinBase();
-  DWORD forward_msg_addr = base + WX_FORWARD_MSG_OFFSET;
-  DWORD init_chat_msg_addr = base + WX_INIT_CHAT_MSG_OFFSET;
+  DWORD forward_msg_addr = base_addr_ + WX_FORWARD_MSG_OFFSET;
+  DWORD init_chat_msg_addr = base_addr_ + WX_INIT_CHAT_MSG_OFFSET;
   __asm {
     PUSHAD
     PUSHFD
diff --git a/src/utils.cc b/src/utils.cc
index e2dc855..d92bd2b 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -1,7 +1,6 @@
-#include "pch.h"
-#include "utils.h"
-
+#include "utils.h"
 
+#include "pch.h"
 
 namespace wxhelper {
 std::wstring Utils::UTF8ToWstring(const std::string &str) {
@@ -19,7 +18,7 @@ std::wstring Utils::AnsiToWstring(const std::string &input, DWORD locale) {
     MultiByteToWideChar(CP_UTF8, 0, input.c_str(), -1, &temp[0], wchar_len);
     return std::wstring(&temp[0]);
   }
-  
+
   return std::wstring();
 }
 
@@ -102,8 +101,6 @@ void Utils::Hex2Bytes(const std::string &hex, BYTE *bytes) {
   }
 }
 
-
-
 bool Utils::IsDigit(std::string str) {
   if (str.length() == 0) {
     return false;
@@ -119,7 +116,8 @@ bool Utils::IsDigit(std::string str) {
 bool Utils::FindOrCreateDirectoryW(const wchar_t *path) {
   WIN32_FIND_DATAW fd;
   HANDLE hFind = ::FindFirstFileW(path, &fd);
-  if (hFind != INVALID_HANDLE_VALUE  && (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
+  if (hFind != INVALID_HANDLE_VALUE &&
+      (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
     FindClose(hFind);
     return true;
   }
@@ -174,4 +172,43 @@ std::string Utils::WCharToUTF8(wchar_t *wstr) {
   return std::string();
 }
 
+bool Utils::IsTextUtf8(const char *str,int length) {
+  char endian = 1;
+  bool littlen_endian = (*(char *)&endian == 1);
+
+  size_t i;
+  int bytes_num;
+  unsigned char chr;
+
+  i = 0;
+  bytes_num = 0;
+  while (i < length) {
+    if (littlen_endian) {
+      chr = *(str + i);
+    } else {  // Big Endian
+      chr = (*(str + i) << 8) | *(str + i + 1);
+      i++;
+    }
+
+    if (bytes_num == 0) {
+      if ((chr & 0x80) != 0) {
+        while ((chr & 0x80) != 0) {
+          chr <<= 1;
+          bytes_num++;
+        }
+        if ((bytes_num < 2) || (bytes_num > 6)) {
+          return false;
+        }
+        bytes_num--;
+      }
+    } else {
+      if ((chr & 0xC0) != 0x80) {
+        return false;
+      }
+      bytes_num--;
+    }
+    i++;
+  }
+  return (bytes_num == 0);
+}
 }  // namespace wxhelper
\ No newline at end of file
diff --git a/src/utils.h b/src/utils.h
index b5e50b1..284c324 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -47,6 +47,8 @@ class Utils {
 
   static std::string WCharToUTF8(wchar_t *wstr);
 
+  static bool IsTextUtf8(const char * str,int length) ;
+
   template <typename T1, typename T2>
  static std::vector<T1> split(T1 str, T2 letter) {
     std::vector<T1> arr;
diff --git a/src/wechat_function.h b/src/wechat_function.h
index 59ee100..a8719eb 100644
--- a/src/wechat_function.h
+++ b/src/wechat_function.h
@@ -133,9 +133,9 @@
 
 
 //ocr
-#define WX_INIT_OBJ_OFFSET 0x7a98f0
-#define WX_OCR_MANAGER_OFFSET 0x7ae470
-#define WX_DO_OCR_TASK_OFFSET 0x13230c0
+#define WX_INIT_OBJ_OFFSET 0x80a800
+#define WX_OCR_MANAGER_OFFSET 0x80f270
+#define WX_DO_OCR_TASK_OFFSET 0x13da3e0
 
 
 //storage