What does the new buzzword 'rotten-tail kids' mean?

'Rotten-tail kids' has become a buzzword to refer to a new working class in China where graduates are struggling to make money due to rising unemployment. Some are forced to accept low-paying work and take money from their parents' pensions. 'Rotten-tail kids' phrase draws parallels to the catchword "rotten-tail buildings" for millions of unfinished homes plaguing China's economy since 2021.