躼本意向书自甲乙双方代表签字盖章之日起生效，有效期一年。
This letter of intent is effected after signed by both parties, and valid within one year.
本合同自甲、乙双方签字或盖章之日起生效，涂改或未经书面授权代签无效。
XIII. The contract shall go into force after the signature of both parties. Alteration or signature without written authorization is invalid.
本协议自双方授权代表签字盖章之日起生效。
The validity of this agreement start from the date when the represent signature and step.
本协议有效期一年，自双方签字盖章并于甲方向乙方支付订金之日起生效。
This agreement is valid for one year and takes effect immediately after both parties sign and stamp on it and Party a pays bargain money to Party b.
本协议自双方签字或盖章完成之日起生效。
Article 12 The parties hereto have caused this agreement to be executed by signature or seal thereof.
本协议自双方签字或盖章完成之日起生效。
Article 12 The parties hereto have caused this agreement to be executed by signature or seal thereof.
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