Demie Cao, known as the rapping ballerina from 5A Label, drops her new Mandarin single, “Rari”. Also released is the new official music video to go along with it. The track “Rari” is written by Demie Cao, her label-mate Justin Park and Phil Da Agony. It’s produced by Brandun DeShay and mixed by Peter “Mstr Rcks” Hong. While the track…