Since the switch socket in China was introduced by Qisheng and Panasonic in the mid-1980s, it has undergone differentiation and combination. At present, it has formed three major production bases in Guangdong, Jiangsu, Zhejiang and Beijing, with high, middle and low grades, four styles of 120, 86, 118 and open decoration.

The overall scale of the domestic market is 12 billion left and right (including 3 billion yuan for high grade, 4 billion yuan for medium...