Subject knowledge and teaching ability are mainly to examine the professional knowledge of the subject, as well as teaching design. I suggest reading more books and practicing more. If you are not sure whether it is junior high school mathematics or junior high school Chinese, it is recommended to apply for junior high school subject 1 and subject 2 first, and then apply for it after confirmation, because if you apply for junior high school mathematics, you need to re-apply for other subjects if you regret it later.