课件分享：https://pan.baidu.com/s/1sMVS7lelA4QTQtea98Afzg
提取码：ejgx
视频回放：https://meeting.tencent.com/v2/cloud-record/share?id=ea45c9fc-2a5d-41ab-b418-93f87b885879&from=3&is-single=false&record_type=2
访问密码：YLPO
