Do I need to make a physical object to apply for a patent for utility model? What are the other conditions? Answer in detail, thank you.

If you don't need physical objects, you just need to explain your patented technology scheme and the core content of patented technology (the content that needs to be protected). Because patent documents are highly professional and involve comprehensive knowledge of law, science and engineering, the requirements for patent writers are very high. I suggest you find a local patent agency to handle it.