- Basic Member
Since
The Sigma Group, founded in 1978, primarily focuses on secondary aluminum smelting and metal scrap trading.Sigma has sizeable plants in Taiwan (Kaohsiung) and China (Shanghai, Zhangzhou, Chongqing, Rizhao, Chengdu, and Changchun), with over 1600 employees and annual turnover of 8.2 billion RMB. The…