Contract is the most basic legal form that reflects transactions. All trading activities must be carried out through the conclusion and performance of contracts. Contractual relationships are the most basic legal relationships in market economy society. E-commerce is an extension of the traditional business model developed in the network environment. Therefore, e-commerce, as part of the entire market system, also needs contracts to regulate its transaction process and maintain its transaction order. Contractual relationships are undoubtedly the most basic legal relationships in e-commerce activities. In this sense, the study of legal issues in e-commerce contracts is a basic work in the entire e-commerce legal research.

In our lives and work, there are many contracts that need to be signed in order to be legally certified, approved, and effective. In traditional transactions, people often use signatures to ensure the authenticity and validity of the identities of the parties to the contract and the consistency of their intentions. At the same time, an autograph is also a requirement of many laws. However, in an e-commerce environment, since the parties to a contract may be thousands of miles apart or even not meet during the entire transaction, it is difficult to apply the traditional signature method to electronic transactions. However, the functions of the traditional autograph method, especially the function of proving the authenticity and integrity of the contract, are still of great value to e-commerce, which has been plagued by network security issues. Therefore, the signature requirement should not only not be abandoned in the e-commerce environment, but should be strengthened and given stronger protection. Of course, the signature mentioned here is no longer a traditional physical signature, but an electronic signature.

The so-called electronic signature, also known as "digital signature", refers to the use of symbols and codes to form an electronic password to "sign" instead of a written signature or seal. It adopts standardized procedures and scientific methods. It is used to identify the identity of the signer and recognize the content of a data message. It can also verify whether the original text of the file has been changed during transmission. In other words, an electronic signature is an electronic signature of an electronic document through cryptographic technology, not a digital image of a written signature. It is similar to a handwritten signature or seal, and may also be called an electronic seal.

The "Contract Law" and the "Electronic Signature Law" provide basic legal protection for the development of e-commerce in my country.