[操作疑難] 支付寶 payment gateway

有冇人整過支付寶 payment gateway
我睇佢d document 睇到一舊雲

我download 左佢個API DEMO落黎,

但係第一步要SET Pid , pid邊到睇到?

係咪要登記左business account先有,  我見佢business account 好難申請, 又要upload 商業登記證又剩