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第四百八十三条 承诺生效时合同成立，但是法律另有规定或者当事人另有约定的除外。
Article 483
A contract is formed at the time when an acceptance becomes effective, unless
otherwise provided by law or agreed by the parties.
第四百八十四条 以通知方式作出的承诺，生效的时间适用本法第一百三十七条的规定。
Article 484
Where an acceptance is made by means of notice, the time when an acceptance
becomes effective is governed by the provisions of Article 137 of this Code.
承诺不需要通知的，根据交易习惯或者要约的要求作出承诺的行为时生效。
Where notice is not required for making acceptance, an acceptance becomes
effective when an act of acceptance is performed according to the parties’
course of dealing or as indicated in the offer.
第四百八十五条 承诺可以撤回。承诺的撤回适用本法第一百四十一条的规定。
Article 485
An acceptance may be withdrawn. The withdrawal of an acceptance is governed by
the provisions of Article 141 of this Code.
第四百八十六条 受要约人超过承诺期限发出承诺，或者在承诺期限内发出承诺，按照通常情形不能及时到达要约人的，为新要约；但是，要约人及时通知受要约人该承诺有效的除外。
Article 486
Where an offeree makes an acceptance beyond the time limit for acceptance, or an
acceptance is made within the time limit for acceptance but it cannot reach the
offeror in time under normal circumstances, such an acceptance constitutes a new
offer unless the offeror timely notifies the offeree that the acceptance is
effective.
第四百八十七条 受要约人在承诺期限内发出承诺，按照通常情形能够及时到达要约人，但是因其他原因致使承诺到达要约人时超过承诺期限的，除要约人及时通知受要约人因承诺超过期限不接受该承诺外，该承诺有效。
Article 487
Where an offeree makes an acceptance within the time limit for acceptance, if it
would have reached the offeror in time under normal circumstances but reaches
the offeror beyond the time limit for other reasons, the acceptance shall be
effective unless the offeror timely notifies the offeree that the acceptance is
not accepted as it exceeds the time limit for acceptance.
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