With their meal of tangyuan, they may also drink a mild rice wine that might contain cassia oil.
And another fact that may surprise you: Guise dancing was mainly practised by local Methodists, who apparently found that disguise made it easier to relax and have fun! There are, of course, the showpiece fire-lit processions to watch - but there's also much, much more.
Alternatively, donate on the day look out for the buckets.