Famous American salesman Joe Gillard summed up the "250 law" in the commercial war. He believes that there are about 250 relatives and friends behind each customer. If you win the favor of a customer, it means winning 250 people. Conversely, if you offend a customer, it means offending 250 customers. This law strongly demonstrates the true meaning of "customer is God." From this, we can get the following revelation: Everyone around you must be taken seriously, because each person has a relatively stable and small group behind him. Being kind to everyone is like illuminating a light and illuminating a large piece.10 years, we are kind to every client and adher to adhering to the ideas of “Professional, Efficient, Sincere”, learn and reserch continuously, keeps up with the times. This is MESCO.