Huo Jiling knew that Li Muyao wasn't used to it yet. She hadn't accepted the fact that she was about to take the college entrance examination. Therefore, Huo Jiling needed some time for Li Muyao to calm down and study when he wasn't around.
Moreover, Huo Jiling had already invited a retired teacher to tutor Li Muyao.
Initially, Huo Jiling wanted to do it himself, but he soon realized that he was lacking. Even though he had read the books from the third year of high school in China, he couldn't explain them as quickly and in depth as the old teachers. For example, Huo Jiling could roughly understand the meaning of the Chinese third-year classical Chinese, but he couldn't express more.
If he wanted Li Muyao to score high, he would have to hire a professional teacher. Huo Jiling decided to retire to the position of tutor and supervisor at night. The rest of the time, Li Muyao would learn from a professional teacher.