C1687 It Is Not Precious at All

After taking it out, the grandpa carefully opened it and handed a blue book to Wang Sheng. He said nervously, "I said I only read it once."

Wang Sheng smiled and said, "As long as you see me blink once, I'll return the book to you right away, okay?" As he spoke, he flipped open the medical book.

As a doctor, he would naturally be interested in these medical books