Send introductions, “ations, product drawings, etc. Copy pictures must be. In the circle of friends who make “es, there is no one who is not sensitive to the “es when selling steel products. Therefore, the ups and downs of the market are the most interested in all steel sales. Send a circle of friends related to customers. Different customers have different stories. This is also the topic that all steel practitioners are most interested in. There are great risks in making steel, so everyone must be interested in such information.