Now 90% of international and domestic trade is not cash transactions, but credit sales. If the arrears are not collected, the enterprise's funds will not be able to turn around. There is a famous saying in the shopping mall: "The salesman is an apprentice, and the master is the one who will collect the accounts." This shows the importance of reminders to enterprises. This lecture will teach us to open the channel from the psychological level with a positive attitude and skills, and quickly recover the arrears, thus increasing profits and enhancing the core competitiveness of enterprises.