(Phone selling is one of the most commonly used selling methods for every B2B e-commerce website, and it is also the most important selling method. Doing a good job in the management of telephone sales and advancing sales is the most important thing for every B2B e-commerce website operator. In particular, the newly constructed B2B office e-commerce website has no foundation or strength to build sales offices in accordance with the region, and can only conduct telephone sales across the country in one region.)