Not to my knowledge, but you could try asking once you make your reservation
There are, but very, very limited. You might not get your money’s value. Or not optimize it.
No vegan food as far as I know. ☹️
Regrettably, Niu does not offer vegans many food as well as drink choices except for their salad bar. For the comparatively high buffet charge, it would be best for a vegan to choose another restaurant.
Except for the salads; none.
Get quick answers from Niu staff and past visitors.