基本案情2003年4月30日,莫某与乙公司订立《长富商贸广场工程合作协议书》,协议由莫某以乙公司的名义与建设单位甲公司签订大朗商贸广场工程施工合同,乙公司的权利义务由莫某实际享有和承担,莫某向乙公司缴纳工程造价的一定比例的费用作为乙公司工程管理费。2003年5月21日,乙公司与甲公司订立《大朗长富商贸广场工程施工合同》。上述协议签订后,莫某于2003年6月23日开始施工,甲公司中途设计变更及增加 Basic case April 30, 2003, MO and B Company entered into a “Chang Fu Business Plaza project cooperation agreement,” the agreement by the MO company name in the name of the construction unit A company Dalang Commerce Square construction contract, B The rights and obligations of the company are actually enjoyed and borne by Moumou, and Mmou pay a certain proportion of the cost of the project cost to Company B as the project management fee of Company B. On May 21, 2003, Company B and Company A entered into the Contract for Construction of Chang-Long Business Plaza in Dalang. After the above agreement was signed, Mokou started construction on June 23, 2003, and a halfway design change and increase