3nh provides users with high-quality and comprehensive pre-sale and after-sale services. No matter what kind of needs and problems users have for products and services, they will get thoughtful and meticulous help from 3nh customer service center. At the same time, the customer service will classify the user's feedback. For example, if 3nh can handle it, 3nh will be responsible for solving the user's problems; if it is the responsibility of the authorized organization of 3nh, the customer service will quickly contact the authorized organization to solve the problems or give corresponding answers as soon as possible.