Fai chun is a traditional decoration that is frequently used during Chinese New Year. People put fai chun in the doorways to create a festive atmosphere. Sometimes written on this decoration is a symbol of good fortune (福), which is also sometimes depicted upside-down.
Customarily, fai chun is written by hand, but owing to convenience, printed versions are mass-produced nowadays. Fai chun is in either square or rectangular shape. It can be hung vertically or horizontally. Not only does it exist in China but also in Korea, Japan, and Vietnam.