According to the ancient etiquette of China, the seven-product salary was passed down from generation to generation: "When people reach seventy, their children and grandchildren are full." . Since the 1970s, there have been few people, and some skills need to be passed on to the next generation.
The modern interpretation of the seven-rank salary biography is: 70 years of spring flowers and autumn fruits have cultivated many students, carried forward the spirit of the times and achieved brilliant life.