Contractual dispute over a construction project between Guangxi-based Wuzhou Xijiang Siqiao Project Investment Management Co., Ltd, Hongyu Construction Group Corporation, Beijing-based Kaiwen Deyu Education Investment Co., Ltd (formerly known as Jiangsu-based Zhongtai Bridge Steel Structure Co., Ltd), Xu Yiying, Liu Feng, Xu Zhigang and Shanghai-based Huayang Mechanical Engineering Co., Ltd