Astheword"upsidedown"isinthesamepronounciationof"coming"inchinese,peoplealwaysputthechineseword"happiness"upsidedownonthedoorinthespringfestivaltoclaimthatthehappine...
Anancientchineseputtheword"happiness"upsidedownonthedoormistakenly,whichturnsouttomatchthemeaningofthe"happinessiscoming".becausetheword"upsidedown"isinthesamepronounciationof"coming"inchinese.Asthetimepassby,upsidingdowntheword"happiness"becomeachineseculture,theancientmistakecomestobeacorrectwaynowadays.