diff --git a/src/main/java/org/shop/crop/CropController.java b/src/main/java/org/shop/crop/CropController.java
index 05f9bc1..6df2ba2 100644
--- a/src/main/java/org/shop/crop/CropController.java
+++ b/src/main/java/org/shop/crop/CropController.java
@@ -3,6 +3,7 @@ package org.shop.crop;
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.tencent.wework.Finance;
 import lombok.extern.slf4j.Slf4j;
 import org.shop.crop.constant.GlobalConstants;
@@ -55,15 +56,17 @@ public class CropController {
 
     @GetMapping("/crop/chatData")
     public List<CropMessage> chatData(Long startSeq, String corpId) throws IOException {
+        LambdaQueryWrapper<CropConfig> wrapper = new LambdaQueryWrapper<>();
+        wrapper.eq(CropConfig::getCropid, corpId);
+        CropConfig config = cropConfigMapper.selectOne(wrapper);
         synchronized (SDK_LOCK) {
             long limit = 50;
             long slice = Finance.NewSlice();
             long sdk = 0;
 
             try {
-                sdk = sdkManager.initSdk(corpId, "mEizahrSF6axdfWtSK_f73a3j6-sV02hhyGG7ogmTpM");
-
-                int ret = Finance.GetChatData(sdk, startSeq, limit, "", "", 1000, slice);
+                sdk = sdkManager.initSdk(corpId, config.getMessageSecret());
+                int ret = Finance.GetChatData(sdk, config.getLastSeq(), limit, "", "", 2000, slice);
                 if (ret != 0) {
                     System.out.println("调用sdk拉取消息接口失败,失败消息为 ret = " + ret);
                     //Finance.FreeSlice(slice);
@@ -212,13 +215,11 @@ public class CropController {
             cropFileService.saveBatch(mediaFiles);
 
             // ✅ 异步触发下载任务（可以轮询数据库）
-            CompletableFuture.runAsync(() -> {
-                try {
-                    downloadPendingFiles(mediaFiles, sdk); // 也可以不传参，改为查数据库
-                } catch (Exception e) {
-                    log.error("异步下载任务异常", e);
-                }
-            });
+            try {
+                downloadPendingFiles(mediaFiles, sdk); // 也可以不传参，改为查数据库
+            } catch (Exception e) {
+                log.error("异步下载任务异常", e);
+            }
         }
         return messageList;
     }
@@ -305,7 +306,8 @@ public class CropController {
         File tempFile = File.createTempFile(GlobalConstants.DOWNLOAD_TEMP_FILE_NAME_PREFIX,
                 msgType, mediaContext.getTempMergeFileDir());
 
-        String indexbuf = null; // 初始化 indexbuf
+
+        String indexbuf = ""; // 初始化 indexbuf
         try (FileOutputStream fileOutputStream = new FileOutputStream(tempFile)) {
             while (true) {
                 long mediaData = Finance.NewMediaData();