本协议有效期为一年，友好协议可以延长。
This agreement is valid for one year, and friendly agreement can be extended.
本协议有效期为一年。
在本协议有效期内，如果一方被发现违背协议条款，另一方有权终止协议。
During the validity of this agreement, if either of the two parties is found to have violated the stipulations herein, the other party has the right to terminate this agreement.
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