Lanxin Grand Theatre is a film about the Shanghai Concession in 1941, directed by Lou Ye and starring Gong Li and Mark Chao. The film tells the story that Yu Yan, a movie star, was invited by the left-wing director Tan Na to return to Shanghai to star in the drama Saturday Novel, but her real identity was a spy and she carried out the operation of obtaining Japanese telegraph code.

The following are some touching stories:

- Yu Yan had to leave his wife and children in order to complete the task;

- Yu Yan did not hesitate to sacrifice herself and protect others when performing her tasks;

- Yu Yan finally chose to commit suicide, but he left a letter to his wife and children, expressing his love and apology for them.