This cache is located at the top of the Niáng Mountain in Hengxian. You can reach Hengxian by bus from Nanning East Bus Station in 2 hours (38 Yuan).
From Hengxian Bus Station it is a 2 hours hike to the top of the small mountain.
If you want to see the real countryside of China (fields of rice and jasmine and lots of hills), I can only recommend you do this as a day-trip from Nanning.