diff --git a/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/service/impl/TmOdsVdqwMessagearchivingServiceImpl.java b/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/service/impl/TmOdsVdqwMessagearchivingServiceImpl.java
index bbf89b3..32520ff 100644
--- a/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/service/impl/TmOdsVdqwMessagearchivingServiceImpl.java
+++ b/ai-analytic-center-biz/src/main/java/com/volvo/ai/analytic/center/service/impl/TmOdsVdqwMessagearchivingServiceImpl.java
@@ -164,7 +164,7 @@ public class TmOdsVdqwMessagearchivingServiceImpl extends ServiceImpl<TmOdsVdqwM
 		DiFyReq diFyImageReq = new DiFyReq();
 		CorpusReportDTO corpusReportDTO = new CorpusReportDTO();
 		OdsVdqwMessageOTD finalMaxMsgTimeItem = new OdsVdqwMessageOTD();
-		StringBuffer chatList = new StringBuffer();
+		StringBuilder chatList = new StringBuilder();
 		String unionId = "";
 		synchronized (this) {//  1，vdqw_workuserinfo 这个表对应是 B端认证中心userId
 			//  2，vdqw_externalcontact 这个表对应是 	企微客户unionId
@@ -188,12 +188,12 @@ public class TmOdsVdqwMessagearchivingServiceImpl extends ServiceImpl<TmOdsVdqwM
 				List<DataMaskingRule> maskingRuleItems = dataMaskingRuleService.getDataMaskingRuleListByApplicationChannel(BusinessTypeEnum.SMART_ASSISTANT_QIWEI.getCode());
 				RunMaskingRuleInput runMaskingRuleInput = new RunMaskingRuleInput();
 				runMaskingRuleInput.setDataMaskingRules(maskingRuleItems);
-				chatList = new StringBuffer();
-				StringBuffer chatList2 = new StringBuffer();
-				StringBuffer chatList3 = new StringBuffer();
-				StringBuffer chatList4 = new StringBuffer();
+				chatList = new StringBuilder();
+				StringBuilder chatList2 = new StringBuilder();
+				StringBuilder chatList3 = new StringBuilder();
+				StringBuilder chatList4 = new StringBuilder();
 				AtomicInteger externalcontactCount = new AtomicInteger();
-				StringBuffer finalChatList = chatList;
+				StringBuilder finalChatList = chatList;
 				contetnList.forEach(contentItem -> {
 					String title = "";
 					if (tmOdsVdqwExternalcontact.getExternalUserId().equals(contentItem.getFromUserId())) {
@@ -254,7 +254,7 @@ public class TmOdsVdqwMessagearchivingServiceImpl extends ServiceImpl<TmOdsVdqwM
 		long startTime2 = System.currentTimeMillis();
 		OdsVdqwMessageOTD finalMaxMsgTimeItem2 = finalMaxMsgTimeItem;
 		String finalUnionId = unionId;
-		StringBuffer finalChatList1 = chatList;
+		StringBuilder finalChatList1 = chatList;
 		CompletableFuture<Void> portraitTask = CompletableFuture.runAsync(() -> {
 			executePortraitTask(finalUnionId, finalMaxMsgTimeItem2, finalChatList1, corpusReportDTO);
 		}, executor);
@@ -322,7 +322,7 @@ public class TmOdsVdqwMessagearchivingServiceImpl extends ServiceImpl<TmOdsVdqwM
 	/**
 	 * 执行客户画像任务
 	 */
-	private void executePortraitTask(String unionId, OdsVdqwMessageOTD maxMsgTimeItem, StringBuffer chatList, CorpusReportDTO corpusReportDTO) {
+	private void executePortraitTask(String unionId, OdsVdqwMessageOTD maxMsgTimeItem, StringBuilder chatList, CorpusReportDTO corpusReportDTO) {
 		try {
 			//"analysisScene": "分析类型",         // 1、企微会话 2、AI通话录音 3、AI铭牌(客流) 4、AI铭牌(试驾)
 			DiFyReq diFyImageReq2 = new DiFyReq();