Ran Yan Le Gong, also known as "Ran Yan Xerox", is an idiom and allusion name, which comes from the 23rd Book of the Later Han Dynasty (Biography of Dou Rong and Dou Xian). In the Eastern Han Dynasty, Dou Xian broke the northern Xiongnu, boarded Yanran, and carved stones to record his merits. Later, "Ran Yan is a musician" means to carve merit on a stone.

Music, sculpture;

Music: Carve the words "merit" on the stone, and the stone will immediately record the merit. Also refers to the establishment or achievement of meritorious service.