The Contract is written in quadruplicate (two for original and copy respectively) which shall become valid on the dateofsignature.
本合同一式四份(正副本各两份)自签署后生效。
2
Any additions, changes and modifications should be carried out in writing to this contract, authorized representatives of both parties effect the dateofsignature.
本合同的任何补充、变更和修改应当以书面方式进行,于双方授权代表共同签字之日起生效。
3
This contract shall come into force for thirteen (13) months from the dateofsignature of the contract by parties and extended if no party opposite when the contract expire.