“Bai Du Bu Qin”
A poetic phrase with origins in Chinese literature, it means “may you be immune from 100 toxins”.
BBC article in 2020
“Immunity from 100 toxins” appears to have originated in a verse by the Cambridge-educated poet Xu Zhimo, and also makes an appearance in the fiction of Louis Cha, a martial arts novelist, but was not known to be said at holidays.
It implies having great self-control and determination as well as not easily succumbing to disease.
https://www.bbc.com/news/51286633
Thoughts of a Cynical Investor 
This cny will definitely be more boisterous. Most families are now pretty blasé with covid.