In order to satisfy the varied requirements of our customers, XHT has purchased several equipments for each quality assurance, corrects them regularly and ensures that hardness readings of each batch of products are accurate. Once the quality assurance of the products is approved, customers are informed immediately by email and receive an electronic quality assurance report attached to the email. Our customers do not waste money on calling to query on the progress of the work. Simultaneously, we use computers to file our data and maintain our report on the long term, in order to approach the concept of a paperless office.