Do i need visa, I'm from Nepal

Hello i am travelling from hiroshima to kathmandu, my flight will be around 09 am and will reach Pvg airport at 11 am then my flight from pvg to kmg is at 9 pm then my flight will be next day 2:30 pm so do i need an entry permit or not? Please advice me. If i need transit permit then i have to apply here in china embassy or i can obtain it in airport because my total time in PRC will be more than 24 hours including pvg to kmg flight.