First of all, compared with mathematics and English, Chinese knowledge is not difficult. It's not that difficult to learn, and its professionalism and difficulty are a little lower than other subjects. Chinese teaching is also a little easier, and the classroom is a little richer. Therefore, it is relatively easy for teachers to test Chinese.
Secondly, teachers are relatively less competitive in compiling and testing Chinese. Compared with a large number of examiners in mathematics and English, their competitiveness is relatively large. The compilation and selection of Chinese language and literature is relatively easy to prepare, and you can make a lot of things for yourself.
Good luck with your exam preparation.