How to apply for patents in multiple countries at the same time abroad?

Submit an application to the World Intellectual Property Office. Patent cooperation treaty, or PCT, can be submitted to the World Intellectual Property Office at the same time as an application for all contracting States, so it can be applied through this channel. When applying for a patent abroad, attention should be paid to the fact that the parties concerned should file a confidentiality review with the patent administration department of the State Council in advance.