A sales contract is a contract whereby the seller transfers the ownership of the subject matter to the buyer and the buyer pays the price for it. 买卖合同是出卖人转移标的物的所有权于买受人，买受人支付价款的合同。 A sales contract shall generally include the name, quantity, quality, and price of the subject matter; the time limit, place, and method for performance;and packaging method,inspection standards and methods, settlement method, the language employed in the contract, and its validity. 买卖合同的内容一般包括标的物的名称、数量、质量、价款、履行期限、履行地点和方式、包装方式、检验标准和方法、结算方式、合同使用的文字及其效力等条款。 A seller shall perform the obligation to deliver the subject matter or a document for taking delivery of the subject matter, and transfer the ownership to the buyer. 出卖人应当履行向买受人交付标的物或者交付提取标的物的单证，并转移标的物所有权的义务。