You don't need to know anything to learn from a chef, you can basically learn. As a qualified chef, you must know how to knife, turn the pan, correctly identify and master the oil temperature, accurately and timely feed, master the temperature, thicken, cook in time, plate and so on. In the chef industry, knife work, spoon work, pulp pumping and chopping are generally regarded as essential basic skills for chefs to get started, while in the cooking industry, the basic skills of cooking are all regarded as compulsory courses and are always persistent.