1. Purpose of after-sales service
   With the values of "Dedication, Collaboration，Innovation", Nenghengji measures and standardizes the behavior of employees, commits itself to service innovation and service commitment, and strives to provide after-sale service beyond customer expectations.
2. After-sales service system
   Nenghengji has a perfect after-sales service system, has a technical support center, to provide strong technical support for the company's services and related products. The technical support center has a group of excellent professional and technical personnel, providing 5×10 hours service mode of after-sales service support, not only can timely provide quick and convenient support for the implementation of the whole service project, but also can provide long-term free technical consultation and other services for customers. In line with the principle of "customer first" and "commitment", Nenghengji promises to reply to users' questions within 24 hours. To provide users with high quality, efficient, professional after-sales service is the pursuit of Nenghengji.
3. After-sales service
   3.1 Acceptance of after-sales service
   Customers can contact the engineers at nENGhengtech Technical Support center in the following ways (Table 1) to submit questions. Including: hotline, fax, email and website online submission and so on. After receiving the problem, the technical support engineer of NENGhengtech will log the problem into the "Customer Problem Tracking and Handling Table" immediately, and conduct preliminary treatment to the problem. If it is a technical problem, the technical support center will provide further support; if it is a product problem, the problem will be referred to the development Department; if it is a project execution problem, the problem will be referred to the project execution department.
   Contact information of after-sales service table 1

3.2 Phone Support
Telephone support refers to that customers seek technical support and help from Nenghengji through telephone, fax, email or online declaration when they encounter difficult problems or abnormal conditions when using Nenghengji products (including service products). After confirming the customer's service request, A technician will be arranged to help the customer find the problem, propose a solution and finally guide the customer to solve the problem within the specified time (i.e. response time) by phone.
3.3 Onsite Support
On-site support is refers to the customers in the use of constant technical product (including service product) when they encounter problems or equipment when not in normal condition, if cannot be handled via phone support, after both sides negotiate to determine the need for the solution of cases, can constant skill will send engineers to the scene analysis the cause of the problem, and finally solve the problem.
? After the on-site problem is solved, Nenghengji engineers shall submit a detailed written analysis report of problem solving to the user.
? For major problems, according to the distance between the fault site and the headquarters of Nenghengji center, the commitment of different journey time to the site. For different distances, the journey time is shown in Table 2.
Road schedule for handling major problems on site 2

3.4 On-site customer return visit service
In order to strengthen the communication between Nenghengtech and customers, and further improve the quality of services and related products provided by Nenghengtech, Nenghengtech will arrange staff to visit and communicate with customers on a regular and irregular basis, take the initiative to collect and sort out the problems concerned by customers, and submit them to relevant departments for solution.
3.5 Sharing of technical data
Technical data sharing refers to that users can timely master the latest network maintenance experience and skills, understand some preventive measures of the equipment they maintain and obtain the latest product knowledge through the online site of NENGhengtech or through the paper documents, emails, disks, CDS and other forms issued by Nenghengtech.

4. After-sale service guarantee measures
   Nenghengji set up quality management department, has a very perfect quality management system, to ensure that all the business of the company in accordance with the process of quality and quantity of implementation. Company has a site survey, system planning and design, installation supervision, installation, integration, cleft grafting, engineering system optimization, project control, project legacy, project summary, the completion of processing, network evaluation/maintenance/optimization, training and development, customer satisfaction management, customer care and after sales customer service standard scientific standard operating procedure (SOP) and quality control Formulate process (QCP), and regularly carry out quality education activities centered on customer satisfaction. Therefore, the quality of after-sales service will be fully guaranteed.