Contractual dispute over financial leasing between Wengniute Banner-based Huanggutun Lead-Zinc Minerals Co., Ltd, China Financial Leasing Co., Ltd, Infund Holding Group, Gongcheng-based Daoping Lead-Zinc Mine Co., Ltd, Quannan-based Guanshan Tungsten Industry Co., Ltd, Xie Songfeng, Xie Haitao, Lu Shanshan, Zhuhai-based Infund Yuefu Investment Partnership and Dongguan-based Xingsheng Trading Co., Ltd