After years of R&D, We successfully created intensive refractory busway, it passed the identification of the National Machinery Industry Bureau in December 1999 ((JC) ID No. 9962087), and it also was granted national patent in December 2000 (ZL.00217053.1), this technology is widely used in Shanghai Pudong International Airport, Shanghai Financial Center, Shanghai Hongqiao Airport magnetic levitation substation and other key projects.