C90
It was rare to see a person like Su Qing Qing. Not when she wasn't serious, but when she was serious was different from when she was serious.
Normally, Su Qing Qing was very serious when she was writing books, but she would frown and think about it every now and then. It was a very ordinary expression. Most people had that kind of expression on their faces. It was not strange at all. However