On March 2, 2017 to 2017 on March 5, 2017, the 22nd south China international exhibition on the mouth in the China import and export will ba state exhibition held in guangzhou, my company AT the meeting fully to launch new products with light-cured composite resin the AT - 400 - u, the AT - 400 - u is a cost-effective, good wear resistance and good compressive, operational good filling resin, site operation and try to let the participants feel AT400U stability and operational, get consistent high praise.