There is a bus from Quzhou Railway Station to Changshan. The platform is on the left when you go out.
Or take a taxi at the station to RT-Mart or Red Sun. There are taxis to Changshan. You need to wait 5 to 20 minutes for carpooling, and the fare is 15 to 20 yuan.
Don't go too much, you'll get ripped off. The first time I paid 60 yuan..., it took half an hour to 45 minutes to get to Changshan.
The Kuai Ke station near Red Sun, even the old railway station, also has Kuai Ke to Changshan. If you are not in a hurry, I recommend Kuai Ke. It does not stop on the way, which is safe and convenient.
The fare is 10 yuan. RT-Mart also has buses to Changshan, but they have to stop on the way.
There is a bus to Hetian at Changshan Station. Just ask any staff at the station and you will be able to find it.
Or there is one on the left side of the station entrance. There are taxis for going to the countryside next to the taxis going to Quzhou. If you are financially well-off, you can consider chartering a taxi.