I want to travel to longhushan from Nanchang by bus. Wanted to inquire if their is any direct bus.

As I know, there is no direct bus between these two places. You can take a train to Yingtan North Railway Station from West Railway Station (about 40 to 50 minutes) first. Then take bus line 23 to Yingtan Railway Station, and change to bus line k2 to the mountain.

The distance is about 106 miles (170km). You can also charter a car to the mountain. The fare may be CNY 600-800 per day.