Initiate a group buying, you are the group leader, others can join your group buying
```javascript
WXAPI.pingtuanOpen(token, goodsId, extJsonStr)
```
+ token user login credentials
+ goodsId commodity id
+ extJsonStr extended attributes (convert Json format data to string)
```json
{
"code": 0,
"data": {
"dateEnd": "2022-01-04 11:35:15",
"goodsId": 6761,
"goodsNumber": 0,
"helpNumber": 0,
"id": 16858,
"orderNumber": 0,
"pingtuanId": 3773,
"status": 0,
"statusStr": "In progress"
},
"msg": "success"
}
```
+ id is the group number. Other users need to join your group based on this id.
+ goodsNumber total number of goods
+ dateEnd cut-off time
+ helpNumber Number of team members (including the team leader himself)
+ orderNumber total order number
+ pingtuanId is the ID of the group setting, corresponding to the id in `setting`
+ status 0 in progress 1 invalid 2 completed