In addition to the first-line business colleagues, the customer service personnel at the factory, such as business assistants, will do a more detailed division of labor. The full-time staff will be divided into two aspects: sample demand and order demand follow-up. In addition, the top managers of each department, such as the vice president level Managers also face customers in person, and proactively announce their personal mobile phone numbers and contact information to assist and supervise all processes in the fastest way.