update doc api

@@ -192,3 +192,34 @@ public static class Response {
     private Long invitationCode;
 }
 ```
+
+
+##### 7. 小程序领取小学期 提交接口
+
+- URL: {{localhost}}/boxfish-online-card/order/textbook/submitXxqOrder
+- Method: POST
+- RequestBody:
+```json5
+{
+    "grade": "GRADE_8_A",
+    "orderName": "领取测试-hua23",
+    "orderMobile": "18388880000",
+    "orderProvince": "北京市",
+    "orderCity": "北京市",
+    "orderCounty": "朝阳区",
+    "orderAddressDetail": "太阳宫",
+    "openId": "oa-sI0UT7aWRT44vi8bIT1i8KYCI",
+    "invitationCode": "100000004"
+}
+```
+
+
+- ResponseBody:
+```json5
+{
+    "status": "SUCCESS",
+    "message": "领取成功",
+    "invitationCode": 100000340
+}
+```
+