diff --git a/.work/extra/doc/FEEDBACK.md b/.work/extra/doc/FEEDBACK.md
new file mode 100644
index 0000000..e16a8d4
--- /dev/null
+++ b/.work/extra/doc/FEEDBACK.md
@@ -0,0 +1,9 @@
+# FEEDBACK Doc
+
+## 1. Do services such as Redis and Mysql support cluster mode?
+
+### (1) Answer
+No
+
+### (2) Explain
+Perhaps it will be supported in the future, but not at the moment because the use case is not very common.
diff --git a/.work/extra/doc/QA.md b/.work/extra/doc/QA.md
index cc45b7c..c9a1eb7 100644
--- a/.work/extra/doc/QA.md
+++ b/.work/extra/doc/QA.md
@@ -1,4 +1,4 @@
-# Q&A DoC
+# Q&A Doc
 
 ## 1. Install and start docker/docker-compose
 
@@ -38,12 +38,11 @@ sudo systemctl status docker
 sudo systemctl start docker
 ```
 
-## 2. Errors
+## 2. Some common errors
 
-## (1) failed programming external connectivity … iptables: No chain/target/match by that name”
+### (1) failed programming external connectivity … iptables: No chain/target/match by that name”
 
 ```bash
 service docker restart
 iptables -L 
 ```
-
diff --git a/README.md b/README.md
index 9e199d5..b0397a5 100644
--- a/README.md
+++ b/README.md
@@ -96,3 +96,4 @@ bash .work/tests/run.sh
 
 - [Q&A汇总文档](.work/extra/doc/QA.md)
 - [DEV开发文档](.work/extra/doc/DEV.md)
+- [FEEDBACK反馈文档](.work/extra/doc/FEEDBACK.md)