Changke has long been in engaging the development and promotion of hi-tech industry and it has established long term strategic relationship with Chinese Academy of Sciences Changchuan Institute of Applied Chemistry (the earliest institute for R&D of Heat Shrinkable material) and China Power Academy High Voltage Institute for close R&D and marketing. To meet the market demand in a better manner and to follow up the fast development of power technology, Changke began to produce the heat shrinkable series product in July 2002 with brand name of “Changke”. Besides the promotion of “Heat Shrinkable Insulated Conversion of substation busbar project” and “Heat Shrinkable Creeping Conversion of Substation Column Insulation project”, Changke has completed many projects of cable fire barrier protection of substation in power system. Changke has developed the “power equipment insulation protective cover 10kv and the below” and the “110 kv anti rain cover of transformer high voltage side incoming line” and obtained the favorable reception from customer.