北京乐开花影业有限公司

In the 1940s, the world was in turmoil, and it was crucial to decipher the enemy's communication codes in a timely and accurate manner. Rong Jinzhen has shown amazing mathematical talent since her childhood, and because she solved the problems assigned by her math teacher, she was noticed by more people, and even walked into the door of code-breaking by mistake.

In 1900, a white woman was murdered in Chinatown in San Francisco, and the suspect was a Chinese man. The murder caused social shock, and people demanded the closure of Chinatown.