How To Manage Customer Relationship Effectively?

Recently, a friend of mine said that customer management is not easy to do. It is too difficult to deal with customers. The specific performance is: do not carry out the sales promotion activities of the company, set up a set of them and do things in a biased way; every time they say that there is no business, the payment is always dragging on; the support of the company is getting smaller and smaller, and the demand is increasing. After listening to his friends, he really felt that his work was