diff --git a/practice/nginx-ingress-installation.md b/practice/nginx-ingress-installation.md
index 56dd6226d..8b9c32f59 100644
--- a/practice/nginx-ingress-installation.md
+++ b/practice/nginx-ingress-installation.md
@@ -1,4 +1,4 @@
-# 使用Helm安装Nginx ingress
+# 安装Nginx ingress
 
 [Nginx ingress](https://github.com/kubernetes/ingress-nginx) 使用ConfigMap来管理Nginx配置，nginx是大家熟知的代理和负载均衡软件，比起[Traefik](https://traefik.io)来说功能更加强大.
 
diff --git a/usecases/edge-computing.md b/usecases/edge-computing.md
index 7285d4dbb..5ae6db332 100644
--- a/usecases/edge-computing.md
+++ b/usecases/edge-computing.md
@@ -1,5 +1,7 @@
 # 边缘计算
 
+TBD
+
 ## 参考
 
 [The Birth of an Edge Orchestrator – Cloudify Meets Edge Computing](http://cloudify.co/2017/07/26/birth-of-edge-orchestrator-cloudify.html)