The commitment letter of genuine software does not specify how long the signature will be valid. The validity of the undertaking depends on the agreement of the undertaking. If there is no agreement, the validity period is generally permanent. Software commitment letter is a technical service commitment letter. In order to ensure the normal operation and use of the system in charge, during the maintenance period, we will be responsible for providing services such as daily maintenance of the system, handling of emergencies, adjustment of system functions, and collection of customer questions and suggestions.