当事人订立合同,应当具有相应的民事权利能力和民事行为能力。 合同的内容由当事人约定,一般包括以下条款: 一、当事人的名称或者姓名和住所; 二、标的; 三、数量; The parties to enter into a contract shall have the corresponding capacity of civil rights and civil capacity. The contents of the contract agreed by the parties, generally include the following provisions: First, the parties' names or names and residences; Second, the subject; Third, the number;