diff --git a/README.md b/README.md
index aa82e08..be47fd0 100644
--- a/README.md
+++ b/README.md
@@ -73,20 +73,22 @@ select_target_alias: [
 
 ## Alias
 
-Some node names in dt-sql-parser code are different from its antlr4's definition.
-
-You can find possible alias in https://github.com/DTStack/dt-sql-parser/blob/main/src/grammar/postgresql/PostgreSqlParser.g4, then add it into `alias` option.
+Some node names in dt-sql-parser code are different from their antlr4's definition.
 
 Example:
+
 ![alt text](./assets/alias-example.png)
 
+You can find possible alias in https://github.com/DTStack/dt-sql-parser/blob/main/src/grammar/postgresql/PostgreSqlParser.g4, then add it into `alias` option.
 
 ## Add a preprocessor
 
 ```typescript
 const myPlugin = new DtSqlParserSemAnalysePlugin({
   preprocessor: [
-    (sql) => sql.toUpperCase()
+    (sql) => sql.toUpperCase(),
+    ...
+  ]
 })
 ```