There will be an airport bus when you leave the airport. You will leave as soon as you get on the bus. The fare is per person 10 yuan. It takes about 15 minutes to get to that city by bus. The airport in Guiyang is not far from the city, so it won't be very tired by car.
You can take the bus to the finish line, but don't sit at the finish line if you want to go to Huaxi South Campus of Guizhou University. When you get on the bus, tell the master to get off at Yanan Gate. You won't go wrong when you get off there, or you won't find it when you turn at Yanan Gate.
After getting off the airport bus, you can take bus No.89, which is a minibus. It takes about 40 minutes to get to the Agricultural College (that is, the south campus), which is still a little far, but it doesn't matter. The farm house is the terminal, not afraid of passing the station. The no.89 minibus costs three yuan per person.
And there is no subway in Guiyang.
I hope you have a good trip.