Different fields, the same principle, can you write a patent?

RT, I'm a novice in patent, and I have an idea to apply for a patent. This case: A company applied to use an airplane in XXX at sea, and I happened to have an idea to take a car or an airplane in XXX on land or in the air (the same as before), and then I had something in common with his product idea. Regarding the technical field of patents, the Patent Examination Guide stipulates that the technical field of inventions or utility models should be the specific technical field to which the technical scheme of the claimed inventions or utility models belongs or is directly applicable, not the superior or adjacent technical field, nor the invention or utility model itself. This particular technical field is often related to the lowest possible position of an invention or utility model in the international patent classification table. For example, an invention about an excavator cantilever is improved by changing the rectangular cantilever section in the background technology into an elliptical section. Its technical field can be written as "the invention relates to an excavator, in particular to an excavator cantilever" (specific technical field), but it is not suitable to be written as "the invention relates to a construction machine" (upper technical field) or "the invention relates to an elliptical section of an excavator cantilever" (the invention itself).