the catering business is good. Entering the winter, in sharp contrast to the cold weather, the "warm winter economy" of the catering industry is gradually heating up and business is getting better. The term "warm winter" was not defined in meteorology in the past, and it is a new meteorological term produced by climate warming. Referring to the concepts of warm current, warm front and warm air mass in meteorology, the climate experts of China Meteorological Bureau divide the phenomenon of cold and warm winter into warm winter and cold winter, that is, the average temperature in a certain region in a certain year (the nationwide winter is from February of last year to February of the following year) is higher than the perennial value or the climate average (the perennial value is generally averaged for nearly 31 years, and the 31-year average from 1971 to 2111 has been used in China since 2112 according to WMO regulations).