(1) When the supply of goods in the market exceeds the demand, the purchase pace of consumers slows down, affecting the speed of sales of goods. The seller's capital turnover is slow, and it is difficult to do business; The buyer has the psychology of choice and slow buying, while the aesthetic psychology is strengthened. (2) When the supply of goods in the market falls short of demand, the sales of goods are fast, the seller's capital turnover is accelerated, the efficiency is improved, and the business is easy to do; The buyer has sensitive psychology, multi occupation psychology, comparative psychology, etc.
