Huadu: Could you tell me how to get from downtown Guangzhou by bus or subway?

It depends on where you start from in Guangzhou.

But I&;m usually used to taking the subway to Renhe Station.

Then walk for about ten minutes after leaving the station.

You can take bus No.1, 701, 715 to Huadu (which bus to take depends on your arrival place).

Have a nice trip!