Ningbo Tianan Group Co.was established in 1969, a national large enterprise engaged mainly in electrical industry. It is also a national key high-tech enterprise. Under the group, there is 1 R&D center, and 10 specialized subsidiary companies. Total employee amounts to more than 3000 and total asset is up to RMB1.8 billion. The products had been sold to all over the country and more than 30 countries. 
Tianan Group is the China famous leading enterprise of electric equipment manufacturer. Including: Transformer (dry and oil-immersed type)
Switchgear, circuit breaker (SF6, vacuum and air type)
Load switch, fuse, disconnector, arrester, PT, CT, etc
RUM (SF6 and air type)
Substation (combined, compact and prefabricated type)