Better, like Jinma (the third floor of Gannan Theater), where I am a member, now the annual card is particularly cheap, more than 600 is enough, there is a bathroom sauna, well-equipped, but there are too many members, which is very crowded!
I suggest you go to the Red Star (just opened) waterfront Xintian.
As far as I know, several gyms will open in Ganzhou soon. The address is not clear, but they are all in the middle and high grade.