Peach wooden color is red, red has the meaning of auspicious, ward off evil spirits, so couplets mostly with red paper writing.
2
最初人们以桃木刻人形挂在门旁以避邪,后来画门神像于桃木上,再简化为在桃木板上题写门神名字。
Initially, people with peach wooden door to ward off evil spirits humanoid hanging in painting, later on, like in peachwood shot-stopper again simplified as in peachwood board inscribed keeper name.
3
于是民间就用桃木刻成他们的模样,放在自家门口,以避邪防害。
Mahogany carved with folk on their appearance, on their own doorstep, in order to ward off evil anti-harm.