Nha trang to Shanghai stopever in Guangzhou then to Germany

Hello
Traveling from Nha Trang to Shanghai but there wasn’t direct flight so first stop is in Guangzhou then to Shanghai. Shanghai stay from 4.12 to 8.12 and then flight to Germany. Is this ok? Or do I need to change the flight to one of these options?
1. Nha Trang to Seoul and then to Shanghai after to germany
2. Nha Trang to Ho Chi Min City then Shanghai and then to Germany
3. Nha Trang to Hanoi then Shanghai then Germany?
Thanks