DM comes from English direct mail, which means express commodity advertisement. Usually, it is printed in color on the front and back of the advertisement paper with eight or sixteen sizes. Hualian Supermarket takes the form of DM as the main means to promote its stores regularly, usually once every two weeks. The products listed on DM are set according to season, month, weather, temperature, popularity, season and other factors. For example, in summer, drinks, heatstroke prevention products, air conditioners, etc. They are all key points, while in winter, hot pot, cooked food and cold-proof products are the main ones. The major festivals in a year are the best time to do DM, such as New Year's Day, Spring Festival, Dragon Boat Festival, Mid-Autumn Festival, Children's Day, National Day and Christmas. DM, sale at reduced prices, limited-time snap-up, lottery, lottery, tasting and competition activities are all important promotional means in shopping malls. (see the picture below)

DM is to maximize sales and improve performance, and its purpose can be roughly summarized as follows:

1. Expand the turnover and increase the gross profit within a certain period;

2. Stabilize the existing customer base and attract new customers to increase passenger flow;

3. Introduce new products, seasonal commodities or products promoted by the company to stabilize consumer groups;

4. Increase the sales of specific commodities (new products, seasonal commodities, own commodities, etc.). ) to increase per capita consumption;

5. Enhance the corporate image and enhance the company's visibility;

6. Competing with the promotion activities held by the same industry;

7. Stimulate consumers' planned purchase and impulse purchase, and increase the turnover of shopping malls.