“出门看天色 进门看脸色” -― I learned this from your grandfather, who learned from your great-grandmother. Basically it means understanding people is as important as understanding weather. The problem nowadays, more people care about the weather than the people! Before you major in any study, learn to major in people. Learn to understand why people do the things they do. Say the things they say. Behave the way they behave. This is a never ending study, because people can change faster than the weather. Understanding people is only part of the journey, next thing you need to master is: “做人”.