Marinate chicken.
Set wok over high heat until hot. Add 2 tablespoons oil. Sprinkle salt. Add bok choy. Stir fry for 1 minute. Add 1/2 cup stock. Cover and cook for 3 minutes. Remove to serving plate and set aside.
Heat wok. Add 2 tablespoons oil. Add ginger, garlic, and hot bean paste. Add chicken. Stir fry for 2 minutes until slightly brown. Add in all the seasonings. Pour in stock. Cover and cook for 1 minute. Stir in cornstarch to thicken. Remove and place on top of the bok choy. Sprinkle scallions on top and serve.