Adjust measures to local conditions. According to the query of official website Medical Education Network, the principle of "dispersing qi in the northwest but being cold" in Su Wen's On Wuchang Political University is to consider the principle of treating drugs according to the geographical characteristics of different regions, that is, the weather in the northwest is cold according to local conditions, people eat more fat and are dry, and their diseases are mostly cold outside and hot inside. We should dispel the cold outside them and cool the heat inside them.