If you want to work in this industry for a long time, I suggest you be a management trainee, because if you want to understand this industry, you must start from the scene, otherwise it is difficult for you to understand something. First of all, you should understand the industry from the knowledge of goods, and then understand the operation mode and marketing mode of supermarkets, which can only be mastered in practice. It will be easier to reinvest in the future. Because investment promotion is nothing more than understanding the goods, suppliers and contract terms.