Article 20

(1)The acceptance time the offeror requiring in the telegram or the letter begins from the sending date of the telegram or the letter or the date printed on the envelop if no date noted on the letter. If it is send by telephone, telex or other means of instantaneous communication,it begins from the moment the offerer received.

(2)The official holiday or the non-business days should be counted in the acceptance. But if the acceptance notice failed to be sent on the last day of the acceptance period that is the official holiday or non-business day, the acceptance period should be extended to the next workday.

Article 21

（1）The delay acceptance is still effective if the offeree is informed within the acceptance period with the oral or written form.

（2）The delay acceptance is also effective if it shows that the letter or other written paper are sent under the condition that they are normally deliveied and can reach the offeree within the period, unless the offeror informs the offeree the offer is ineffective in the way of oral or written inform the moment beyond the acceptance period. Article 22

An acceptance can be withdraw if the notice was sent before the effective time of the acceptance or at the same time it reaches the offeree.

Article 23

An contact should be drawn up the moment the offer becomes effective in accordance with this convention.

Article 24

For the purpose of this part of the Convention, the quotation, acceptance notice or other things that indicates having been sent to the offeree should have informed the offeree by oral or have sent by other ways to himself or his business address or mailing address or his usual habitual address without business address or mailing address.

PART III-Sale of Goods

Chapter I-General Provisions

Article25

If one party breaks the contract and causes losses to the other party and deprives what the other party ought to gains according to the contract, the act can be called as fundamental breach of the contact. Unless the party which breaks the contract can’t foresee and the same reasonable of the same kind can’t foresee the act at the same circumstance, his act wouldn’t be fundamental breach of the contact.

Article26

Proclaim of the ineffectiveness of the contract will be effective only after the other party having been informed.

Article27

Unless it is obviously expressed in the part of this Convention, the party still owns the right accordance with the notice, the requirement or other notices he send in an appropriate way, even though it is failed to reach the other party punctuality due to the