China Nuclear Power Maintenance Co., Ltd. (referred to as CNNC Maintenance) is a specialized company engaged in nuclear power maintenance and repair business under China National Nuclear Industry Group Co., Ltd. It is a national high-tech enterprise and the main force for nuclear island maintenance of nuclear power plants in China. It is also the engineering rescue team of China's nuclear emergency rescue team The specific implementation units of the team and operational skills training base. In the 1980s, with the breakthrough of achieving "zero" in nuclear power in China, CNNC Maintenance undertook the mission of ensuring the operation and maintenance safety of nuclear power plants in China. It began the start of nuclear power maintenance business on the banks of Daya Bay and at the foot of Qinshan Mountain. Here, we have gained confidence and courage in fighting the market Qi has won high praise and recognition from the market.