>>2820541
imo, not worth it. The big cities become completely deserted (especially Shenzhen) as all the migrant workers go home, loads of restaurants shut for the entire CNY period, trains are mega overbooked and you can't go anywhere, tourist attractions are either closed or operating reduced hours
all of the regular liveliness is replaced with cold empty streets and old people setting off firecrackers in their neighbourhood courtyards
I know you want cold but winter in China (esp. the north) is just depressing, smog and pollution every day, and really strong freezing wind (picrel Beijing during CNY this year)
go to Japan or central Asia, you'll have a much better time