To sum up:

Take the bus (888, 266, 278, 276, Qingmuguan to Shishi Qiaopu, Bishan to Hongqi Hegou) to Shapingba Teachers College. Go straight across the railway bridge after getting off the bus, take two buses opposite Edward Hospital, and then take a taxi when you arrive. The price of this plan is low, as long as 15 yuan, but you need to transfer to another train.

Another way is to take Hongqihegou, take the airport bus to California bus station or take a taxi to the airport. This plan is not easy to find, so you need to ask more questions.