在国际工程招标中,中标通知书的发出意味着合同的成立。根据国际公约的要求,以及要求书面形式往往是为了解决合同的证据问题,因此,即使招标投标双方约定或者法律规定,合同应当采用书面形式,也不意味着合同应当在双方签订书面合同时成立。中标后无论是中标承包商还是业主,如果拒签合同都应当承担违约责任。 Bidding in international projects, the successful bidder means the issuance of the contract. According to the requirements of the international conventions and the requirement of written form, the contractual evidence is often solved. Therefore, even if the bidding parties agree or the law stipulates that the contract should be in written form, it does not mean that the contract should be established when both parties sign a written contract. After winning the bid, whether it is the successful contractor or the owner, if the contract of refusal should bear the liability for breach of contract.