C20 Drug delivery

After a day of teaching, it had already ended very early in the afternoon.

Wu Ting suddenly asked a question. She was asking Xu Feng what he was best at doing.

Xu Feng was startled for a moment, and wanted to say something, but seeing how serious Wu Ting was, he decided to say it out, and replied that he was concocting pills.

After Wu Ting heard this, she asked who she had learned it from