diff --git a/2019/12/vue-router.md b/2019/12/vue-router.md
index c4458d4..e90845f 100644
--- a/2019/12/vue-router.md
+++ b/2019/12/vue-router.md
@@ -165,3 +165,5 @@ export default {
 
 2.使用： 动态路径参数  用: 开头
 
+（1）在main.js 的路由定义中：
+  { path: "/a", component: aa },
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