Visa for China for Guatemalan citizen

Hello! I have a passport from Guatemala but now I am working in Germany. I want to travel from Zurich to New Zealand, but I have a connecting flight in Shanghai (PVG) it is 6.5 hours from Zurich-New Zealand and 2.5 hours from NZ- Zurich. I will not go out of the airport in PVG. Do I need a visa for China? Can I apply for the 24h TWOV? the TWOV is done at the airport when I arrive in Shanghai and I would not need any additional documents more than my ticket to New Zealand, is this correct?

Thanks!