Kunming - Nanning

I have 15days trip to Yunnan next year, I will travel to Shangri-la - Lijiang - Dali - Kunming. I will reach Kunming on 17th Feb, and I have booked a flight back to my country on 22nd Feb depart from Nanning. At first I have plan to visit Hangzhou for few days in between. But the flight ticket from Kunming-Hangzhou-Nanning is too expensive. So I decided to cancel my plan to Hangzhou.

Can you suggest any other place to visit in between, If possible can you suggest any place that on the way from Kunming - Nanning.