You Longgu (1923-1993) was from Fuzhou, Fujian Province. After her graduation from the Art Department of the Nanjing Central Academy in 1949, she joined the People's Liberation Army, where she became an art teacher. In 1955, she joined the newly established propaganda poster team of the Shanghai People's Fine Arts Publishing House, where she worked with her former classmate, colleague and husband Ha Qiongwen (哈琼文). Their son Ha Sizhuang (哈思庄) became a poster designer / artist as well. Their daughter Ha Siyang (哈思阳) became senior editor at the Shanghai People's Fine Arts Publishing House. She edited and wrote several publications about her parents' life and work.

Although Ms. You designed children's illustrations towards the end of her active career, she was mainly known for her propaganda posters.