Gōuqiàn de shíhòu yào bǎ shēngfěn tiáo chéng shuǐ zhuàng.
When thickening the sauce, mix the cornstarch with water first.
Tips
culture
In Hong Kong / Cantonese cooking 生粉 usually means cornstarch (玉米淀粉); in mainland recipes it can also mean potato starch (土豆淀粉) or tapioca starch — context decides. The opposite is 熟粉 (pre-cooked starch).