以下供參考：
“此合同雙方簽字或蓋章后生效”
The Contract shall take effect upon being signed and sealed by both parties.
《中華人民共和國合同法》
Contract Law of the People's Republic of China
根據(jù)《中華人民共和國合同法》,甲乙雙方秉著互惠互利、平等協(xié)商的原則制定本合同,雙方同意以下條款
This Contract is enacted according to "Contract Law of the People's Republic of China" and on the principle of mutual reciprocity and equal negotiation .The Parties agree the following details:
提供人：廣州匯泉翻譯公司 查紅玉