Liu Hui is the greatest mathematician in ancient China and enjoys a high reputation in the history of mathematics in the world. He was born around 250 AD, and his life story is unknown. He was born in poverty, never held an official position in his life, took mathematical research as his own responsibility, tried hard to find the truth, and left priceless treasures for our nation.

Euclid (Greek: ε υ κ λ ε ι δ η? 330 BC-275 BC), an ancient Greek mathematician. During the period of Ptolemy I Soter (364 BC-283 BC), he was active in Alexandria. Known as the "father of geometry", he is the author of the mathematical masterpiece Element and one of the greatest mathematicians in the world.