How much it costs to travel in mrt from baiyun airport to trade fair complex. Is there weekly pass?

You may take metro line 3 to Kecun Station, and change to line 8 to Pazhou Station. After leaving from exit A or B, you can see the trade fair complex. The trip takes about 1 hour, and it costs CNY 8.

I am sorry that there is no weekly pass. But you may consider the Three-Day Pass. It costs CNY 50, and you can use it to ride on metro lines within 72 hours after swiping it for the first time.