Contractual dispute over joint real estate development between Long Jinping, Chen Qiaofang, Wang Aicun, Longshi Holdings Group Co., Ltd, Huamin Junlian Capital Investment Co., Ltd, Handan-based Jinwutong Real Estate Development Co., Ltd, Lian Qin, Beijing-based Xingwang Wanming Breeding Center and Beijing-based Pacific Industry and Trade Development Co., Ltd