diff --git a/docs/types/number.md b/docs/types/number.md
index bb9c1b0..53ebfb5 100644
--- a/docs/types/number.md
+++ b/docs/types/number.md
@@ -280,6 +280,12 @@ NaN * 32 // NaN
 NaN / 32 // NaN
 ```
 
+但是，ES6 引入指数运算符（`**`）后，出现了一个例外。
+
+```javascript
+NaN ** 0 // 1
+```
+
 ### Infinity
 
 **（1）含义**