CCC National Product Certification, PCCC product certification, CRCC railway product certification, and obtained the National Industrial Product Production License, AAA credit rating certificate, etc.As the long-term main supplier of State Grid of China Corporation, China Southern Power Grid Corporation, Provincial Power Grid Corporation, China Railway Corporation and many large well-known real estate companies, Tong-da's products, widely used in smart grid, electrified railway, urban rail traffic, real estate engineering, home decoration, have exported to more than 60 countries and regions, such as Europe, Middle East, Southeast Asia, Africa and highly received unanimous praise from numerous customers.