The name of Qian Sanyi in Pi is not so simple. This name comes from the philosophical discourse of "Tao gives birth to one, life gives birth to two, life gives birth to three, life gives birth to three, and everything gives birth to one". Although the name Qian Sanyi looks inconspicuous, it is actually of great significance.

Qian Sanyi is a top student in the senior high school entrance examination. He has lived in a strict family since childhood. In the eyes of parents, Qian Sanyi is an obedient child. In the eyes of teachers, Qian Sanyi is a three-good student and a male god+schoolmaster in the eyes of classmates. Although Qian Sanyi looks beautiful on the surface, in fact, he is not happy. Only when you get along with Lin can you be your truest self.

Lin is a classmate of Qian Sanyi. Earlier, Qian Sanyi told everyone the meaning of his name, and he also ridiculed Lin's name as too corny, but Lin retorted that the name Qian Sanyi was too simple. Everyone admires Qian Sanyi, but Lin always opposes him, but they are just quarreling. Lin in the mind very admire Qian Sanyi.

Qian Sanyi feels cheap when he speaks, but whenever a classmate asks him questions about math or physics, he will explain them to his classmates. He never hides anything, and he is never afraid that others will surpass him. Instead, he knows how to share with others and pass on what he understands to everyone, so his classmates like Qian Sanyi very much.