Hi, please is the bus from changzhi, shanxi to nanning, guangxi or from nanjing, jiangsu to get there?

It is around 2,000km between Changzhi and NN City. As it is too far, there is so bus service between. I suggest you take a bus from Changzhi to Zhangzhou first. Then take a train or flight to your destination.

From Nanjing to get there, no bus service is available either. I suggest you fly there directly. Besides, there is a train running between, which takes around 32h.

Buses from Changzhi to Zhengzhou are scheduled from 06:00 to 20:30 every half an hour. It costs CNY73 per person.

As for the timetable for trains and flights as well as their fare, you can easily search at the TRAIN and FLIGHT pages at this website.

P.S. the air ticket fare varies from time to time, you may get some discount during slack season.