The fax and seal of the contract are valid. Stamping is an effective way to sign a contract, and fax is also a written form of the contract. As long as it is concluded by the parties according to law and the parties have corresponding civil capacity, the contract is valid.
Legal objectivity:
According to Article 490 of the Civil Code of People's Republic of China (PRC), which came into effect in 202 1 and 1, if the parties conclude a contract by contract, the contract is established when the parties sign, seal or fingerprint it. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.