Sin Leomg was one of the 4 heavenly kings chef.
He used to have a few branches of sin leong.
The 4 kings also owned restaurants like Lai Wah, Dragon Phoenix, red star, red ruby etc.....all famous in their hey days and history preceded Boon Lay raja by a few decades.
http://www.misstamchiak.com/makansu...estaurant-by-chef-sin-leong-and-hooi-kok-wai/
Redstar still around what, behind Chinatown there.