Two transits; Kunming and Shanghai. Do I need a visa?

I will be flying from Kathmandu to Auckland all the way with the Chinese company China Eastern. I will have two transits; the first one will be in Kunming and the second one will be in Shanghai. I will be in China for a total of 26-27 hours. Is the free 72 hours free transit in Kunming valid for this? I'd like to hear from you, because it's very unclear for me at the moment. I need to know if I need to get a visa beforehand or not. My nationality is Dutch.