What's the procedure for diamond boy's fingerprint?

The program that the characters and children take part in is "Come and see our concert".

"Come and See Our Concert" is a variety show performed by native friends. While singing China's outstanding music works, it is dedicated to expressing the musical memories of the times and the friendship stories between friends.

"Fingerprint" is composed of diamond and Xiao Gui * * *, and their voices are perfectly matched, which explains the extreme romantic feelings of this song.