Does the subject want to ask "What should I do if the electronic display of catering invoice shows 1"? Update the software or driver and contact technical support.

1. Update the software or driver: the version of the software or driver is incompatible or expired, so you can update the software or driver to the latest version.

2. Contact technical support: You can contact the technical support team of the electronic version of the catering invoice for further help and solutions.