施工企业的经营活动中,要签订各类形式多样的合同。概括起来说,主要包括两大类,一类是与建设单位签订的建设工程施工合同(以下简称施工合同),另一类是与供应商、分包商签订的材料采购、租赁和专业分包合同(以下简称“非施工合同)。通常来说,前者标的额巨大,法律关系复杂,发生争议对各方利益影响重大,因此备受施工企业、建设单位和相关法 Construction enterprises in the business activities, to sign all forms of various types of contracts. To sum up, there are two main categories, one is the construction contract with the construction unit (hereinafter referred to as the construction contract), and the other is the procurement, leasing and subcontracting with the suppliers and subcontractors Contracts (hereinafter referred to as ”non-construction contracts." Generally speaking, the former has a huge amount of subject matter and complicated legal relations, and the dispute has a significant impact on the interests of all parties. Therefore, many construction enterprises, construction units and related laws