修改下

pcloud-service-book/src/main/java/com/pcloud/book/group/biz/impl/BookGroupBizImpl.java

@@ -1108,6 +1108,7 @@ public class BookGroupBizImpl implements BookGroupBiz {
             if (joinGroupCipherHas != null) {
                 cipher = UUIDUitl.generateShort();
             }
+            cipher = "RAYS_" + cipher;
             JoinGroupCipher joinGroupCipherNew = new JoinGroupCipher();
             joinGroupCipherNew.setCipher(cipher);
             joinGroupCipherNew.setWechatUserId(wechatUserId);