（1）After receiving the customer's quality problems, reply within 24 hours or send the service personnel to the scene at the fastest speed for after-sales service until the customer satisfaction.
（2）Indeed, when necessary, our company will send qualified personnel to the scene for technical guidance services.
（3）Any change in the quality of the materials supplied by our company will be replaced free of charge.
（4）Actively participate in the engineering coordination meeting of the customer organization, strictly implement the meeting minutes or agreements signed by the two parties. Regular visits to understand the user's use of materials.
（5）After the completion of the contract, our company will continue to provide technical services to customers, and then answer customer inquiries.
（6）Division I will further improve the service work, the timely service, advanced service, the whole process of service, quality service throughout the product manufacturing, installation of the whole process.
（7）In the event of winning the bid, the undertaking shall become an integral part of the contract, and shall have the same legal effect as the contract.