diff --git a/pywxdump/api/local_server.py b/pywxdump/api/local_server.py
index 812eeeb..6e9b56b 100644
--- a/pywxdump/api/local_server.py
+++ b/pywxdump/api/local_server.py
@@ -16,7 +16,7 @@ import pythoncom
 import pywxdump
 
 from flask import Flask, request, render_template, g, Blueprint, send_file, make_response, session
-from pywxdump import get_core_db, all_merge_real_time_db
+from pywxdump import get_core_db, all_merge_real_time_db, get_wx_db
 from pywxdump.api.rjson import ReJson, RqJson
 from pywxdump.api.utils import get_conf, get_conf_wxids, set_conf, error9999, gen_base64, validate_title, \
     get_conf_local_wxid, ls_loger
@@ -277,7 +277,9 @@ def merge():
     out_path = request.json.get("outPath")
     if not out_path:
         return ReJson(1002)
-    rdata = merge_db(wxdb_path, out_path)
+    db_path = get_wx_db(wxdb_path)
+    # for i in db_path:print(i)
+    rdata = merge_db(db_path, out_path)
     return ReJson(0, str(rdata))
 
 # END 这部分为专业工具的api ***********************************************************************************************
diff --git a/pywxdump/api/remote_server.py b/pywxdump/api/remote_server.py
index 0725e34..aacc2a2 100644
--- a/pywxdump/api/remote_server.py
+++ b/pywxdump/api/remote_server.py
@@ -147,7 +147,9 @@ def get_imgsrc(imgsrc):
             rc, fomt, md5, out_bytes = dat2img(original_img_path)
             if not rc:
                 return ReJson(1001, body=original_img_path)
-            imgsavepath = os.path.join(str(img_tmp_path), img_path + "_" + ".".join([md5, fomt]))
+            imgsavepath = os.path.join(str(img_tmp_path), img_path + "_" + "".join([md5, fomt]))
+            if os.path.exists(imgsavepath):
+                return send_file(imgsavepath)
             if not os.path.exists(os.path.dirname(imgsavepath)):
                 os.makedirs(os.path.dirname(imgsavepath))
             with open(imgsavepath, "wb") as f:
diff --git a/pywxdump/wx_core/merge_db.py b/pywxdump/wx_core/merge_db.py
index 9171e58..32cc653 100644
--- a/pywxdump/wx_core/merge_db.py
+++ b/pywxdump/wx_core/merge_db.py
@@ -110,13 +110,12 @@ def merge_db(db_paths: List[dict], save_path: str = "merge.db", is_merge_data: b
 
     if isinstance(db_paths, list):
         # alias, file_path
-        databases = {f"MSG{i}": (db['db_path'],
-                                 db.get('de_path', db['db_path'])
-                                 ) for i, db in enumerate(db_paths)
+        databases = {f"dbi_{i}": (db['db_path'],
+                                  db.get('de_path', db['db_path'])
+                                  ) for i, db in enumerate(db_paths)
                      }
     else:
         raise TypeError("db_paths 类型错误")
-
     outdb = sqlite3.connect(save_path)
 
     is_sync_log = check_create_sync_log(outdb)
@@ -134,15 +133,21 @@ def merge_db(db_paths: List[dict], save_path: str = "merge.db", is_merge_data: b
         sql_attach = f"ATTACH DATABASE '{de_path}' AS {alias}"
         out_cursor.execute(sql_attach)
         outdb.commit()
-        sql_query_tbl_name = f"SELECT name FROM {alias}.sqlite_master WHERE type='table' ORDER BY name;"
+        sql_query_tbl_name = f"SELECT tbl_name, sql FROM {alias}.sqlite_master WHERE type='table' ORDER BY tbl_name;"
         tables = execute_sql(outdb, sql_query_tbl_name)
         for table in tables:
-            table = table[0]
+            table, init_create_sql = table[0], table[1]
+            table = table if isinstance(table, str) else table.decode()
+            init_create_sql = init_create_sql if isinstance(init_create_sql, str) else init_create_sql.decode()
             if table == "sqlite_sequence":
                 continue
+            if "CREATE TABLE".lower() not in str(init_create_sql).lower():
+                continue
             # 获取表中的字段名
             sql_query_columns = f"PRAGMA table_info({table})"
             columns = execute_sql(outdb, sql_query_columns)
+            if table == "ChatInfo" and len(columns) > 12:  # bizChat中的ChatInfo表与MicroMsg中的ChatInfo表字段不同
+                continue
             col_type = {
                 (i[1] if isinstance(i[1], str) else i[1].decode(),
                  i[2] if isinstance(i[2], str) else i[2].decode())
diff --git a/pywxdump/wx_core/wx_info.py b/pywxdump/wx_core/wx_info.py
index 98b2ec4..ad7c334 100644
--- a/pywxdump/wx_core/wx_info.py
+++ b/pywxdump/wx_core/wx_info.py
@@ -389,10 +389,12 @@ def get_wx_db(msg_dir: str = None,
         db_types = None
 
     wxid_dirs = {}  # wx用户目录
-    for sub_dir in os.listdir(msg_dir):
-        if os.path.isdir(os.path.join(msg_dir, sub_dir)) and sub_dir not in ["All Users", "Applet", "WMPF"]:
-            wxid_dirs[os.path.basename(sub_dir)] = os.path.join(msg_dir, sub_dir)
-
+    if "All Users"in os.listdir(msg_dir) or  "Applet"in os.listdir(msg_dir) or "WMPF"in os.listdir(msg_dir):
+        for sub_dir in os.listdir(msg_dir):
+            if os.path.isdir(os.path.join(msg_dir, sub_dir)) and sub_dir not in ["All Users", "Applet", "WMPF"]:
+                wxid_dirs[os.path.basename(sub_dir)] = os.path.join(msg_dir, sub_dir)
+    else:
+        wxid_dirs[os.path.basename(msg_dir)] = msg_dir
     for wxid, wxid_dir in wxid_dirs.items():
         if wxids and wxid not in wxids:  # 如果指定wxid,则过滤掉其他wxid
             continue