"This is the most comprehensive collection of Chinese traditional music, which we want to share with a wider audience. Now, the singers and players who sang and played the music have mostly died, even the musicians who made the recordings are mostly no longer with us. This is why we have a deep sense of responsibility to preserve these audio materials," says Han, adding that since many of the early musical materials in China was mainly kept orally, audio materials are crucial.

According to Han, the launch of the digitalized sound archives also celebrates the 30th anniversary of the establishment of the Memory of the World program, which UNESCO established in 1992 as a global initiative to prevent the loss of important collections held in libraries and archives.

"This heritage is a shared, common legacy that should be transmitted to later generations," according to the website of the UNESCO."Through its international register, which currently lists 245 items from most countries in the world, the Memory of the World enables the intellectual treasures that have been created by all cultures and in all regions to be better known."

In autumn 1993, Henri Lopes, the then UNESCO assistant director general for culture, visited the Chinese National Academy of Arts in Beijing. Qiao Jianzhong, the then head of the academy, invited him to experience the sound archives.