Refurbishment of the shenzhen drilling network technology company ltd. Was officially launched in june 2016, with its headquarters in shenzhen, guangdong, an internet o2o platform dedicated to mobile phone maintenance and recycling, focusing on providing professional, easy-to-hand mobile phone-to-home maintenance services to a wide range of users. The headquarters has a professional mobile phone maintenance engineer who is familiar with the internal structure and working principles of the various brands, can make a quick and correct judgement based on the customer's description of the cell phone problem and then provide a one-stop solution, which normally allows mobile phones to return to normal use in 30 minutes. Clients can conduct mobile phone maintenance appointments directly online, and the system automatically sends a single to the next-door teacher, provides rapid maintenance services, specialized technology, transparent maintenance processes, and makes customers more trusted and already serving over a million customers. Users can look at micro-credentials or websites, go to the front page of the system, choose the brand, machine type, colour, cause of failure, address of service, etc., and then see the price of maintenance, transparency, use of micro-credit and payment to increase customer trust, while also raising the profile of the brand, which, with passing through, can have a larger volume of business in the market. Once the appointment service has been completed on the mobile phone, the time and place of the appointment can be filled in so that it can wait quietly for the engineer to come to the door, which is very easy to operate and the service is more appropriate. The spare parts provided to customers are all of their original plant quality and have been tested by relevant technology and are entitled to free replacement for non-anthropogenic failure for 180 days after sale. Upon completion of the service, headquarters conducts telephone calls to clients to learn about their service experience and to build a higher-quality 51-branding premise on client experience。