How should a company as a legal person issue a travel certificate if it wants to travel abroad?

If it is restricted personnel, it depends on the requirements of your foreign affairs office. Generally, you will be required to provide one of the contracts, invoices and participation certificates. As for the specific one, it depends on the requirements of those who restrict you;

If you are asking for visa information, the legal representative should print the English employment guarantee certificate (in the format required by the embassy) on the company stationery, then ask the deputy to sign it, and then provide the original business license.