1.
Heat vegetable oil in wok over high heat until lightly smoking.
2.
Add pork bell and stir to brown pieces on all sides, about 1 minute.
3.
Add Chinese broccoli, garlic, chilies, oyster sauce, and sugar; stir.
4.
Cook until broccoli is tender-crisp, about 1 minute.
5.
Remove from heat, season with fish sauce, and serve over rice.