diff --git a/pgsql/Demo/StreamReplication/README.md b/pgsql/Demo/StreamReplication/README.md
index 6fb8812..c805b77 100644
--- a/pgsql/Demo/StreamReplication/README.md
+++ b/pgsql/Demo/StreamReplication/README.md
@@ -108,3 +108,16 @@
     # 在 pgsql1 里创建数据库、表或更改数据，在 pgsql2 里可以看到
     ```
 
+- 查看状态
+    ```
+    docker exec -u postgres pgsql1 pg_controldata -D /var/lib/pgsql | grep cluster
+    # 主库(pgsql1)输出: in production
+    docker exec -u postgres pgsql2 pg_controldata -D /var/lib/pgsql | grep cluster
+    # 从库(pgsql2)输出: in archive recovery
+    ```
+
+- 从库提升为主库
+    ```
+    docker exec -u postgres pgsql2 pg_ctl promote
+    ```
+