1. The contract between the two parties should be in duplicate. If there is only one copy, it is valid as long as both parties sign it. The contract effect meets the following requirements:

(1) The parties to a contract have corresponding capacity for civil rights and capacity for civil conduct;

(two) the intention of the parties to the contract is true;

(3) It does not violate the law or public interests.

2. Legal basis: Article 143 of the Civil Code of People's Republic of China (PRC).

A civil juristic act that meets the following conditions is valid:

(1) The actor has corresponding capacity for civil conduct;

(2) the meaning is true;

(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.

Second, does the contract take effect only if it is signed rather than printed by hand?

The contract is valid only if it is signed without fingerprints. According to the law, if the parties conclude a contract in the form of a contract, the contract is established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it. A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.