Legal analysis: Any confirmation letter with complete procedures produced in accordance with the law is legally binding.

Legal basis: "The People's Republic of China and the Civil Code"

Article 465 A contract established in accordance with the law shall be protected by law. A contract established in accordance with the law is only legally binding on the parties, unless otherwise provided by law.

Article 469: The parties may conclude a contract in written form, oral form or other forms. Written forms are contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the content contained therein. Data messages that can tangibly express the content through electronic data exchange, email, etc., and can be retrieved at any time, are deemed to be in written form.