The 50k voucher is valid at Cong Cafe, the staff are enthusiastic, and the drinks are delicious.

bought voucher but staff won't let me redeem it

few branches used

You need to register as a member at Cong to use the voucher (just scan the zalo code right at the restaurant), redeem the voucher quickly, delicious food, the Ngo Thoi Nhiem branch is spacious and cool.

Beautiful restaurant, good service staff, clean... Impressed with the restaurant at 6A Ngo Thoi Nhiem.

The restaurant has a cool garden, fresh drinks, and a relatively crowded atmosphere.

buy a lot but processing time is a bit long, can vouchers be combined? I will know when I use it tomorrow

1) not applicable to all branches, only applicable to certain branches. These branches are all far away. 2) changing the terms of use without prior notice (1 voucher/invoice) 3) calculating that there is no saving but having to work hard (50k voucher bought at 50k price) => doing business like this is forcing your business to go out of business soon.