Old Xian (Old先) is based in Hangzhou, China. She graduated from the Central Academy of Fine Arts (CAFA) in 2013. Whilst at university she meet a writer called Moss. The two decide to collaborate and released two manhuas before even graduating. In 2012 they released The Specific Heat Capacity of Love as well as Xiao Chou Dan Ni (aka Clown Danny). Xiao Chou Dan Ni earned Xian a Shueisha Tezuka Award and a Golden Dragon Awards.