You can consider Empress or Jade for Chinese food! I did mine at Empress pre-covid with 12 pax inclu bride and groom and the private room could accomodate.
would not recommend grand shanghai. food is good but i signed a AD package with them and they have varied the terms tremendously in view of the covid situation. i did my ROM at empress. there is a private room that can hold 15 pax i believe (pre covid). I also shortlisted JAde at Fullerton but...