On April 23, the signing ceremony of strategic cooperation agreement between WANBAO Mining Limited and Yunnan Tin Group was held in NORINCO. Among those present at the ceremony were Yang Xiaoqing, vice president of NORINCO and chairman of WANBAO Mining Limited, Gao Wenxiang, executive deputy general manager of Yunnan Tin Group, and Sui Ping, general manager of WANBAO Mining Limited.