diff --git a/src/models/CECRecordTotal.ts b/src/models/CECRecordTotal.ts
index aec0367..06bfa14 100644
--- a/src/models/CECRecordTotal.ts
+++ b/src/models/CECRecordTotal.ts
@@ -64,6 +64,9 @@ export class CECRecordTotalClass extends BaseModule {
    * discord ticket:        26, 7, 9, 11, 13, 15, 17, 20, 21, 22, 23, 24, 25
    * p2e season 2(Contribution Clash): 18
    * founder's tag holder: 19
+   * 机动: 100, 101, 102, 103, 104, 105, 106, 107, 108, 109
+   * 机动位的用法: 比如现在是第三期, 要给某用户补发badge的奖励, 但他已经领了1,2期的奖励, 那就把他1,2期rate设为0, 
+   * 把第3期的rate改为16, bit位改为未使用的机动位
    */
   @prop({ type: () => ClaimStatus, _id: false })
   public claimStatus?: Map<string, ClaimStatus>