This is an automatically translated description

John Jinzhen is a mathematical genius with a bizarre past, and his reserved demeanour hides an extraordinary emotional sensitivity. He is the best Chinese cryptographer of his time and an employee of China's secretive international intelligence agency. He has just managed to crack the world's most difficult Purple Code, but the enemy already has a new one - the Black Code. Will the hero be able to save the country, and most importantly, will he be saved himself?