What is the background music of lawyer Wang Gong's speech?

The background music of Wang Gong's lawyer's black hole speech clip is "Worldly Sorrow". Black Hole is based on Zhang Chenggong's novel of the same name, directed by Guan Hu and starring Tao Zeru and Chen. The play profoundly exposes the evil behind the prosperous economy and shows a scene of a desperate struggle between justice and evil.