chapter 805 Simple and crude identification method

Sending a calculus book as a birthday gift... Listen, is this even a human thing? If Hailee Ye was here, she would definitely mock, "You, someone who hasn't even completed primary school, actually know about calculus?" I might not see it, but I ought to hear about it. During their conversation, they entered the auction house. Ronan Sun did not waste any time and instructed Hien Sun to take out the elixirs. Soon, Hien Sun carefully brought a small gourd-shaped jade bottle...