The law is recognized, because the other party’s copy only has our signature but not the other party’s signature, which does not affect the effectiveness of the contract

Please see

The contract is established Requirements and Validity Requirements

The establishment of a contract means that the parties reach an agreement and establish a contractual relationship. The validity of a contract means that a contract with valid requirements has produced legal effect according to its meaning. In most cases, the requirements for the contract to be effective are met when it is established, so the time of its establishment and production are consistent.

Generally speaking, there are three requirements for the establishment of a contract: (1) The parties must have the same intention, that is, consensus, which is the fundamental requirement for the establishment of a contract. If the expressions of intention are inconsistent, that is, if agreement is reached but no consensus is reached, the contract cannot be established. (2) Consensus must involve two or more parties. It is impossible for only one party to reach an agreement, and therefore it is impossible to establish a contract. (3) The parties’ expression of intention must be for the purpose of entering into a contract. If there is no expression of intention for the purpose of entering into a contract, even if an agreement is reached, a contract cannot be established. There are also some contracts, such as formal contracts and practical contracts. In addition to the above three elements, their establishment also requires special elements, that is, in a certain way or to complete the delivery of the subject matter. Otherwise, a contract cannot be formed.

It is generally believed that the general requirements for a contract to be effective are:

1. The parties must have the corresponding capacity to conclude the contract when entering into the contract. This is essentially a legal provision on the qualifications of contract subjects. If the subject is unqualified, the contract entered into will not be legally effective. There are two types of contract subjects: natural persons and non-natural persons. As the subject of the contract, non-natural persons have the main behavioral capacity. As the subject of a contract, a natural person's contractual capacity should be determined based on his capacity for civil conduct.

2. The parties to the contract express their true intentions. This is another requirement for a valid contract. The so-called true expression of intention means that the offers and commitments made by the parties during the contracting process are expressions of their independent and true will. Under normal circumstances, the actor's will is consistent with his external performance. However, due to certain subjective or objective reasons, inconsistency between the two may also occur.

3. The contract does not violate the law or social public interests. This is the most important of the contract production requirements. The contract lacked legality and had no room for redress. It could only be fully effective. The contract violates the law and social public interests, which refers to both the purpose and content of the contract, that is, the purpose and content of the contract must not violate the law or social public interests. The “law” mentioned here includes not only the mandatory provisions in existing laws, regulations and administrative rules, but also the prohibitive and imperative provisions of national policies.