Adding spices, mainly garlic juice, hot pepper oil, hot and sour taste of garlic shows.

加入调料，主要是蒜汁、辣椒油，口味酸辣之中透着蒜香。

youdao

Stir-fry chicken in 2 tbsp oil until done. Add green/red bell pepper and Lee Kum Kee Chili Garlic Sauce. Stir well and serve hot.

用2汤匙油炒熟鸡丁，加入青/甜红椒及李锦记蒜蓉辣椒酱，炒匀上碟。

youdao

When pouring hot oil in the sauce, ensure the green pepper at the bottom to keep Vitamin c.

热油浇料碗时青椒垫底避免维生素C受破坏。

youdao

When the oil is hot but not yet smoking, add the chiles and Sichuan pepper and stir-fry briefly until they are crisp and the oil is spicy and fragrant.

NPR: Savoring The Spice In Kung Pao Chicken