diff --git a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/rule/TimeRangeParser.java b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/rule/TimeRangeParser.java
index f9abfdaae..773aba448 100644
--- a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/rule/TimeRangeParser.java
+++ b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/rule/TimeRangeParser.java
@@ -32,7 +32,7 @@ public class TimeRangeParser implements SemanticParser {
 
     private static final Pattern RECENT_PATTERN_CN = Pattern.compile(
             ".*(?<periodStr>(近|过去)((?<enNum>\\d+)|(?<zhNum>[一二三四五六七八九十百千万亿]+))个?(?<zhPeriod>[天周月年])).*");
-    private static final Pattern DATE_PATTERN_NUMBER = Pattern.compile("(\\d{8})");
+    private static final Pattern DATE_PATTERN_NUMBER = Pattern.compile("\\b(\\d{8})\\b");
     private static final DateFormat DATE_FORMAT_NUMBER = new SimpleDateFormat("yyyyMMdd");
     private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");
 
diff --git a/headless/server/src/main/java/com/tencent/supersonic/headless/server/service/impl/RetrieveServiceImpl.java b/headless/server/src/main/java/com/tencent/supersonic/headless/server/service/impl/RetrieveServiceImpl.java
index a47275277..be227399e 100644
--- a/headless/server/src/main/java/com/tencent/supersonic/headless/server/service/impl/RetrieveServiceImpl.java
+++ b/headless/server/src/main/java/com/tencent/supersonic/headless/server/service/impl/RetrieveServiceImpl.java
@@ -1,6 +1,5 @@
 package com.tencent.supersonic.headless.server.service.impl;
 
-import com.google.common.collect.Lists;
 import com.tencent.supersonic.common.pojo.User;
 import com.tencent.supersonic.common.pojo.enums.DictWordType;
 import com.tencent.supersonic.headless.api.pojo.SchemaElement;