You can spend an afternoon exploring the galleries in Guangxi Museum of Nationalities during your trip to Nanning. Take in the musical theater while you're in the area.
What are the best cheap things to do in Shanglin County?
Sightseeing doesn't have to be expensive. You if want to get outdoors, try a visit to Dalong Lake or make a stop at attractions like Zhicheng City site. Be certain to include a visit to Tian Ping Scenic.