Where the parties enter into a contract by letter, data message, or any other form and require a written confirmation to be signed, the contract is formed when the written confirmation is signed. 当事人采用信件、数据电文等形式订立合同要求签订确认书的，签订确认书时合同成立。 If the information on goods or service released by one party on an information network such as the Internet meets the conditions for an offer,the contract is formed when the other party selects the goods or service and successfully submits the order, unless the parties agree otherwise. 当事人一方通过互联网等信息网络发布的商品或者服务信息符合要约条件的，对方选择该商品或者服务并提交订单成功时合同成立，但是当事人另有约定的除外。 The place of effectiveness of an acceptance shall be the place of the formation of the contract. 承诺生效的地点为合同成立的地点。