my previous friends have answered some of the contents, so I won't repeat them.
a patent engineer is a person who wants to write patent documents. First of all, you must have a certain understanding of technology, and then you must have some attainments in writing skills. You can clearly express an invention idea in words, but you can't write it dead. And this one needs more than one or two years of training in patent writing, and there are about 5 cases written to reach the level of engineers.
Patent agents abroad are all senior patent engineers. Moreover, patent agents are not necessarily lawyers, and those who graduate from general law (liberal arts) do not meet the examination qualifications of patent agents, but those who graduate from engineering.
If you want to engage in the patent business, you'd better find a famous patent agency to start as an apprentice. Studying in it for two or three years and laying a solid foundation for case writing can qualify for this qualification.