Longquan china trains or buses from hong kong.

Hi, Jon.
There is no train from HK to Longquan and neither of the the direct buses to your destination.

If you want to go but having no special requirements on the transportation methods, you can fly to Wenzhou first. From the airport, you can find the direct buses for Lishui city. From Lishui West Bus Station, there are direct buses for Longquan.

If you really want to enjoy the train trip, you are advised to go to Guangzhou first from HK. Then take a train from Guangzhou Railway Station to Jinhua. From Jinhua West Bus Station, you can find the direct buses for Longquan.