https://developers.weixin.qq.com/doc/offiaccount/Account_Management/Generating_a_Parametric_QR_Code.html

文档位置，生成二维码的参数：{"expire_seconds":172800,"action_name":"QR_STR_SCENE","action_info":{"scene_str":"TEST"}}

生成的二维码链接：https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQEA8DwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyeFMzMklDM3VjcmoxbGN2M2h3Y04AAgRMvEBgAwQAowIA

扫描二维码后，服务端收到的事件并未带上scene_str，收到的事件的内容如下：

<FromUserName><![CDATA[ow54b01nZ_m29c4SgvBFbS6HQj24]]></FromUserName>

<CreateTime>1614855007</CreateTime>

<MsgType><![CDATA[event]]></MsgType>

<Event><![CDATA[SCAN]]></Event>

<EventKey><![CDATA[]]></EventKey>