What is the name of the opera "Su San left Hongtong County"?

"Su San has left Hongtong County" is from "Yutang Chun".

Yutang Chun is not only the initiation of the Dan character in Peking Opera, but also perhaps one of the most widely circulated plays in Chinese opera. The play was written by an unknown author in the Qing Dynasty, but the story is found in Feng Menglong's "A Cautionary Tale", Volume 24, "Yutang Chun in Distress with Her Husband", as well as in "The History of Love", Volume 2.

Su San (Yutang Chun), a famous prostitute in the Ming Dynasty, fell in love with Wang Jinlong, the son of the minister of the Ministry of Justice, and made a promise to each other for life. Jinlong with the silver spent, was driven out by the pimp, had to survive in the Guanwang Temple, Su San learned of the gift of silver, to help him go to the test. The pimp was greedy for money and sold Su San to Shen Yanlin, a rich merchant in Shanxi, as a concubine. Shen's wife, Pi, wanted to poison Su San and set him up, but she died after being eaten by Shen Yanlin. Pi's wife accused Su San of conspiracy to commit murder and was sentenced to death. Su San was escorted to Taiyuan Province, by the inspector, the Secretary and the Environment Department of the three trial. But the inspector was Wang Jinlong. Wang saw Su San was wronged, was shocked, could not hold himself, and for Pan Bizheng, Liu Bingyi see through. Wang pretended to be sick to stop the trial, the night into the prison and Su San meeting, and was Liu Bingyi bumped into, Liu Pan Bizheng persuasion, vindicated Su San's wrongful imprisonment, Wang Jinlong and Su San reunion.

"Su San left Hongtong County" is the song when Su San was convicted and left Hongtong County for Taiyuan.