旧时代的戏文里，常出现有人身买卖的契约、合同，俗称“卖身契”。那种订立人身买卖契约的事，如今已成为历史了。然而，在经济活跃、市场流通日趋繁荣昌盛的今天，由于劳务合同、工程合同、承包合同、招标合同等大量出现，一条违法的“生死合同”常常堂而皇之地塞进合同... Old times in the play, there are often personal trading contracts, contracts, commonly known as “sell deeds.” The kind of contract for personal business has now become history. However, due to the emergence of a large number of labor contracts, construction contracts, contract contracts and bidding contracts, an illegal “contract of life and death” has often been thrown into the contract with great vitality and an increasingly prosperous market.