设计了高效的公平电子合同签名交换协议，有利于签名交换的顺利完成。

Applying a efficient Fair Electronic sign exchanging protocol. It is useful for people to exchange their signature.

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但是，请用电子邮件发送付有您签名的合同，以便我可以看得清楚点。

After you have confirmed receipt of the contract, please make the prepayment to us as soon as possible.

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文章第四部分，涉及了与合同订立紧密相关的电子合同形式、电子签名和电子认证制度等诸多内容。

Part IV deals with those contents closely related with conclusion of contract, such as the forms of electronic contract, electronic signature and electronic authentication etc.

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