Lecturer is the core soul of marketing. It directly determines the success or failure of a sales meeting. From this. You can completely understand it as earning 100W+ a year. Earn someone else's income for a year in January. These are beyond our power. An excellent sales lecturer needs to have the professionalism of product knowledge. Only with sufficient professional knowledge. Only in this way can the dimension be reduced and the target group be hit. Turn tedious knowledge points into life scenes. Let customers truly realize the value of products.