how much oil and salt to use, whether to put oil in a cold or hot pan, how long to stir-fry for, and the appropriate heat level—small, medium, or large fire. The chef guided him through each step via...t, took out the ingredients left for dinner from the refrigerator, and cooked another pot of rice.Not long after.Wen Ping Sheng walked into the kitchen and lowered his voice to say, "My brothers just...