Why Chinese Couplets are Written on Red Color Paper

Red is a very lucky colour for the Chinese, it frightens off the New Year monster 'Nian' who arrives at this time of year and destroys crops and homes.

"Nian" has three weaknesses: it was frightened by noise, sunshine, and the colour red. So villagers built fires, set off firecrackers, and painted the doors to their houses red and placed red couplets beside the doors. Red to the Chinese also represents good fortune, fame and riches.