diff --git a/README.md b/README.md
index 30b7f7d..8aec434 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,17 @@
 - kabq-common(公共模块：公共配置，公共代码)
 - kabq-model (模型模块)
 - knowledge-report (知识报送模块)
+
+# nGql语句及注意事项
+
+注意事项:
+1. 必须创建索引之后,才能根据字段查询到数据
+2. 创建索引之后,必须rebuild这个索引,索引才能生效,才能查到数据
+
+构建索引
+~~~ ngql
+
+CREATE TAG INDEX IF NOT EXISTS item_branch_item_name_index ON item_leaf(item_name(100));
+REBUILD TAG INDEX  item_branch_item_name_index ;
+CREATE TAG INDEX IF NOT EXISTS item_leaf_item_name_index ON item_leaf(item_name(100));
+REBUILD TAG INDEX  item_leaf_item_name_index ;
\ No newline at end of file
diff --git a/kbqa-graph/src/main/java/com/supervision/ngbatis/domain/tag/ItemBranch.java b/kbqa-graph/src/main/java/com/supervision/ngbatis/domain/tag/ItemBranch.java
index bf28539..03cfe5b 100644
--- a/kbqa-graph/src/main/java/com/supervision/ngbatis/domain/tag/ItemBranch.java
+++ b/kbqa-graph/src/main/java/com/supervision/ngbatis/domain/tag/ItemBranch.java
@@ -7,7 +7,7 @@ import javax.persistence.Id;
 import javax.persistence.Table;
 
 @Data
-@Table(name = "itemBranchTag")
+@Table(name = "item_branch")
 public class ItemBranch {
 
     @Id