schedules and fares for bus from Guangzhou to Chongqing

There are few buses for CQ from Guangzhou.
From Guangzhou Tianhe Bus Station, there is only one bus to reach CQ and the bus is at around 12:20. From Haizhu Bus Station, there is one at 10:30. There are two buses from Xiamao Bus Station at 11:00 and 12:00. There is one at GZ Bus Station at 11:50.

For the trains, there are eight trains everyday to reach CQ North Railway Station and for the detail information, it is suggested to look in the Train Section on this website and I am sure you can find what you want.