diff --git a/epmet-module/resi-group/resi-group-server/src/main/java/com/epmet/modules/topic/service/impl/ResiTopicServiceImpl.java b/epmet-module/resi-group/resi-group-server/src/main/java/com/epmet/modules/topic/service/impl/ResiTopicServiceImpl.java
index a246d751d2..2249441579 100644
--- a/epmet-module/resi-group/resi-group-server/src/main/java/com/epmet/modules/topic/service/impl/ResiTopicServiceImpl.java
+++ b/epmet-module/resi-group/resi-group-server/src/main/java/com/epmet/modules/topic/service/impl/ResiTopicServiceImpl.java
@@ -57,9 +57,7 @@ import com.epmet.resi.group.dto.topic.result.ResiTopicDetailResultDTO;
 import com.epmet.resi.group.dto.topic.result.ResiTopicInfoResultDTO;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
 import org.springframework.data.redis.core.RedisTemplate;
-import org.springframework.data.redis.core.ValueOperations;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -203,7 +201,7 @@ public class ResiTopicServiceImpl extends BaseServiceImpl<ResiTopicDao, ResiTopi
                 attachment.setAttachmentUrl(url);
                 attachment.setTopicId(topic.getId());
                 attachment.setCreatedBy(tokenDto.getUserId());
-                attachment.setAttachmentFormat(url.substring(url.lastIndexOf("\\.") + 1).toLowerCase());
+                attachment.setAttachmentFormat(url.substring(url.lastIndexOf(".") + 1).toLowerCase());
                 attachment.setSort(sort++);
                 resiTopicAttachmentDao.insertOne(attachment);
             }
@@ -287,7 +285,6 @@ public class ResiTopicServiceImpl extends BaseServiceImpl<ResiTopicDao, ResiTopi
      **/
     @Override
     public Result<List<ResiTopicInfoResultDTO>> getPastTopicList(TokenDto tokenDto, ResiTopicPageFormDTO topicPageFormDTO) {
-
         if (null == tokenDto) {
             return new Result().error(ModuleConstant.USER_NOT_NULL);
         }
diff --git a/epmet-module/resi-group/resi-group-server/src/main/resources/mapper/topic/ResiTopicDao.xml b/epmet-module/resi-group/resi-group-server/src/main/resources/mapper/topic/ResiTopicDao.xml
index 6d13caa557..0baa4f4771 100644
--- a/epmet-module/resi-group/resi-group-server/src/main/resources/mapper/topic/ResiTopicDao.xml
+++ b/epmet-module/resi-group/resi-group-server/src/main/resources/mapper/topic/ResiTopicDao.xml
@@ -112,7 +112,7 @@
          SELECT
           attachment.TOPIC_ID AS attachmentTopicId,
           attachment.ATTACHMENT_URL as firstPhoto,
-          MIN(attachment.SORD)
+          MIN(attachment.SORT)
           FROM
           RESI_TOPIC_ATTACHMENT attachment
           WHERE