If I want to apply for a patent, what should I do? Is there any professional recommendation?

The patent application process is complicated, except that it will be easier to apply for a patent for appearance. I suggest you find a professional organization to do it for you. But no matter who you are looking for, you must ask the price first, and then sign a confidentiality agreement with him before you can give them technical disclosure. You can do whatever they want. There are templates, and then the patent agent will search for you. If you can apply and sign an agency contract, they will follow yours. After writing the materials, the professional organization will send them to you for personal review and then submit your signature. We started from 18 to find international intellectual property rights in Vietnam, and made six or seven in succession. They have a good attitude, and they are always involved in everything. There are supervisors and agents, who can at least answer questions at any time, and the leaders also supervise the process and service. You can ask them for advice.