update

src/modules/exam/views/CreateStudent.vue

@@ -41,7 +41,7 @@
         <el-checkbox label="自定义准考证号" v-model="isChecked"></el-checkbox>
         <el-input
           v-model="form.examinee_number"
-          placeholder="不超过20个字母必填"
+          placeholder="不超过30个字母必填"
           v-if="isChecked === true"
           style="width: 400px"
         />