Other sales channels are mainly the company's own marketing methods and strict control of brand promotion and market. In recent years, some exhibition organizers have compiled some special marketing databases through the advantages of professional exhibitions. It’s easy to use. I don’t know if you can create a marketing database for Zhanke’s teaching instruments and equipment, but our testing instruments can be purchased at the exhibition, and the effect is relatively good. You can Baidu China Scientific Instruments Expo buyers list, there is a free download online