Audio source: https://www.youtube.com/watch?v=M_x7kNsyP3M
Sheet music: http://imslp.org/wiki/The_Golden_Steel-Smelting_Furnace_(Chen%2C_Gang)
The piece is an adaption of the 1970’s popular song “Chairman Mao’s glory illuminates the furnace (毛主席的光辉把金色的炉台照亮). It is based on the cordial conversation Mao had with the steelworkers during his inspection of a steel mill.
(Source: https://baike.baidu.com/item/%E9%87%91%E8%89%B2%E7%9A%84%E7%82%89%E5%8F%B0)