Besides, he took a crooked road before, and he wouldn't have woken up if Zhang Wansen hadn't helped him solve it.
Zhang Wansen's painful experience finally made him understand that if you don't take the right path, your family will be ruined. So he got scared and began to make up for his previous mistakes and be doubly good to his sister.
Moreover, he has done a lot of tests before, and when he comes back, he will find that he will definitely be twice as kind to his sister.