当事人一方要求签订新合同，必须在本合同期满90天前向另一方提出，经双方协商同意后签订新合同。

If either of the two parties asks for a new contract, it should forward its request to another party 90days prior to the expiration of the contract, and sign the new contract with mutual consent.

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合同的变更。经当事人双方协商同意后，可以变更。在未达成一致意见前，仍应当严格履行合同。

The contract can be modified with mutual consent. Before both parties have reached an agreement, the contract should be strictly observed.

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合同的解除。经当事人双方协商同意后，可以解除合同。在未达成一致意见前，仍应当严格履行合同。

The contract can be canceled with mutual consent. Before both parties have reached an agreement, the contract should be strictly observed.

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