Shenzhen vs Vietnam Airlines

[boeingbusbenn]

Does anyone know the differences in the following for Vietnam vs. Shenzhen Airlines?
- Travel benefits (interline ID90s/zed fares, and online travel)?
- Scheduling (I understand that VNA is mostly out-and-backs, what is Shenzhen like)?
- flying with expats mostly vs locals?
Thank you!

[Dream Land]

I would advise you to do some research with other expats living in PR China, I hear the red tape is incredible and they tend not to follow the written contract.