The scores cover various forms of chamber music, including string, wind, percussion, keyboard, and vocal, with a focus on instrumental works. Many internationally renowned musicians, such as pianists Martha Argerich, Gary Graffman, violinist Itzhak Perlman and cellist Yo-Yo Ma, have used these scores in their performances. Some have handwritten markings left by these musicians during rehearsals.

"I am very touched and impressed by this library. I told maestro Yu Long to make something simple, but this is not simple. This is extraordinary," Juillet says.

Peng & Pan, a string duo from the Guangzhou Symphony Orchestra, consisting of violinist Peng Ke and cellist Pan Yang, performed Austrian composer Hanns Eisler's work, Duo for Violin and Cello, during the ceremony from the score donated by Juillet.

The long friendship between the couple and Yu, who served as the music director of the Guangzhou Symphony Orchestra from 2003 to 2023, and is now the orchestra's honorary music director for life, started 19 years ago.