diff --git a/src/stores/EmailSlice.js b/src/stores/EmailSlice.js
index 4974e81..d862837 100644
--- a/src/stores/EmailSlice.js
+++ b/src/stores/EmailSlice.js
@@ -139,7 +139,12 @@ const emailSlice = (set, get) => ({
     return false
   },
 
-  // 更新数量
+  /**
+   * 更新数量
+   * @usage 1. 邮件列表页切换用户时
+   * @usage 2. 收到新邮件推送时
+   *
+   */
   updateMailboxCount: async ({ opi_sn }) => {
     // const { setMailboxNestedDirsActive } = get()
     await getMailboxCountAction({ opi_sn })