diff --git a/WeChatFerry/spy/rpc_server.cpp b/WeChatFerry/spy/rpc_server.cpp
index 2192558..ab99536 100644
--- a/WeChatFerry/spy/rpc_server.cpp
+++ b/WeChatFerry/spy/rpc_server.cpp
@@ -75,7 +75,7 @@ static bool func_is_login(uint8_t *out, size_t *len)
 static bool func_get_self_wxid(uint8_t *out, size_t *len)
 {
     return FillResponse<Functions_FUNC_GET_SELF_WXID>(Response_str_tag, out, len, [](Response &rsp) {
-        std::string wxid = GetSelfWxid();
+        std::string wxid = user_info::get_self_wxid();
         rsp.msg.str      = wxid.empty() ? nullptr : (char *)wxid.c_str();
     });
 }
@@ -83,7 +83,7 @@ static bool func_get_self_wxid(uint8_t *out, size_t *len)
 static bool func_get_user_info(uint8_t *out, size_t *len)
 {
     return FillResponse<Functions_FUNC_GET_USER_INFO>(Response_ui_tag, out, len, [](Response &rsp) {
-        UserInfo_t ui     = GetUserInfo();
+        UserInfo_t ui     = user_info::get_user_info();
         rsp.msg.ui.wxid   = (char *)ui.wxid.c_str();
         rsp.msg.ui.name   = (char *)ui.name.c_str();
         rsp.msg.ui.mobile = (char *)ui.mobile.c_str();
diff --git a/WeChatFerry/spy/user_info.cpp b/WeChatFerry/spy/user_info.cpp
index a273592..7566ff3 100644
--- a/WeChatFerry/spy/user_info.cpp
+++ b/WeChatFerry/spy/user_info.cpp
@@ -1,7 +1,14 @@
-#include "user_info.h"
+#include <filesystem>
+#include <mutex>
+
+#include "fill_response.h"
 #include "log.hpp"
+#include "user_info.h"
 #include "util.h"
 
+namespace user_info
+{
+
 extern UINT64 g_WeChatWinDllAddr;
 
 #define OS_USER_HOME   0x5932770
@@ -9,50 +16,69 @@ extern UINT64 g_WeChatWinDllAddr;
 #define OS_USER_NAME   0x595C3D8
 #define OS_USER_MOBILE 0x595C318
 
-static char home[MAX_PATH] = { 0 };
-
-string GetHomePath()
+std::string get_home_path()
 {
-    if (home[0] == 0) {
-        string path = Wstring2String(GET_WSTRING(g_WeChatWinDllAddr + OS_USER_HOME)) + "\\WeChat Files\\";
-        strncpy_s(home, path.c_str(), path.size());
-    }
+    static std::once_flag flag;
+    static std::string home_path;
 
-    return string(home);
+    std::call_once(flag, [] {
+        std::string path = Wstring2String(GET_WSTRING(g_WeChatWinDllAddr + OS_USER_HOME)) + "\\WeChat Files\\";
+        home_path        = std::filesystem::absolute(path).string();
+    });
+
+    return home_path;
 }
 
-string GetSelfWxid()
+std::optional<std::string> get_self_wxid()
 {
-    UINT64 wxidType = 0;
+    UINT64 wxid_type = 0;
     try {
-        wxidType = GET_UINT64(g_WeChatWinDllAddr + OS_USER_WXID + 0x18);
-        if (wxidType == 0xF) {
+        wxid_type = GET_UINT64(g_WeChatWinDllAddr + OS_USER_WXID + 0x18);
+        if (wxid_type == 0xF) {
             return GET_STRING_FROM_P(g_WeChatWinDllAddr + OS_USER_WXID);
         } else {
             return GET_STRING(g_WeChatWinDllAddr + OS_USER_WXID);
         }
     } catch (...) {
-        LOG_ERROR("wxid type: {:#x}", wxidType);
-        LOG_BUFFER((uint8_t *)(g_WeChatWinDllAddr + OS_USER_WXID), 20);
-        return "empty_wxid";
+        LOG_ERROR("Failed to get wxid, type: {:#x}", wxid_type);
+        LOG_BUFFER(reinterpret_cast<uint8_t *>(g_WeChatWinDllAddr + OS_USER_WXID), 20);
+        return std::nullopt;
     }
 }
 
-UserInfo_t GetUserInfo()
+UserInfo_t get_user_info()
 {
     UserInfo_t ui;
+    auto wxid = get_self_wxid();
+    ui.wxid   = wxid.value_or("unknown_wxid");
 
-    ui.wxid = GetSelfWxid();
-
-    UINT64 nameType = GET_UINT64(g_WeChatWinDllAddr + OS_USER_NAME + 0x18);
-    if (nameType == 0xF) {
-        ui.name = GET_STRING_FROM_P(g_WeChatWinDllAddr + OS_USER_NAME);
-    } else { // 0x1F
-        ui.name = GET_STRING(g_WeChatWinDllAddr + OS_USER_NAME);
-    }
+    UINT64 name_type = GET_UINT64(g_WeChatWinDllAddr + OS_USER_NAME + 0x18);
+    ui.name          = (name_type == 0xF) ? GET_STRING_FROM_P(g_WeChatWinDllAddr + OS_USER_NAME)
+                                          : GET_STRING(g_WeChatWinDllAddr + OS_USER_NAME);
 
     ui.mobile = GET_STRING_FROM_P(g_WeChatWinDllAddr + OS_USER_MOBILE);
-    ui.home   = GetHomePath();
+    ui.home   = get_home_path();
 
     return ui;
 }
+
+bool rpc_get_self_wxid(uint8_t *out, size_t *len)
+{
+    return fill_response<Functions_FUNC_GET_SELF_WXID>(out, len, [](Response &rsp) {
+        auto wxid   = get_self_wxid();
+        rsp.msg.str = wxid ? wxid->c_str() : "error";
+    });
+}
+
+bool rpc_get_user_info(uint8_t *out, size_t *len)
+{
+    return fill_response<Functions_FUNC_GET_USER_INFO>(out, len, [](Response &rsp) {
+        UserInfo_t ui     = get_user_info();
+        rsp.msg.ui.wxid   = ui.wxid.c_str();
+        rsp.msg.ui.name   = ui.name.c_str();
+        rsp.msg.ui.mobile = ui.mobile.c_str();
+        rsp.msg.ui.home   = ui.home.c_str();
+    });
+}
+
+} // namespace user_info
diff --git a/WeChatFerry/spy/user_info.h b/WeChatFerry/spy/user_info.h
index 8d70dc7..a959b04 100644
--- a/WeChatFerry/spy/user_info.h
+++ b/WeChatFerry/spy/user_info.h
@@ -1,12 +1,24 @@
 #pragma once
 
+#include <optional>
 #include <string>
 
 #include "pb_types.h"
 
-using namespace std;
+namespace user_info
+{
 
-string GetHomePath();
-string GetSelfWxid();
+// 获取 WeChat 数据存储路径
+std::string get_home_path();
 
-UserInfo_t GetUserInfo();
+// 获取自身 wxid
+std::optional<std::string> get_self_wxid();
+
+// 获取用户信息
+UserInfo_t get_user_info();
+
+// RPC 方法
+bool rpc_get_self_wxid(uint8_t *out, size_t *len);
+bool rpc_get_user_info(uint8_t *out, size_t *len);
+
+} // namespace user_info