Taboos of Chinese New Year

Bringing In the New Year and Expelling the Old
Shooting off firecrackers on New Year's Eve is the Chinese way of sending out the old year and welcoming in the New Year. On the stroke of midnight on New Year's Eve, every door in the house, and even windows, have to be open to allow the old year to go out.
New Year Activities Set Precendent
All debts had to paid by this time. Nothing should be lent on this day, as anyone who does so will be lending all the year. Back when tinder and flint were used, no one would lend them on this day or give a light to others.
Everyone should refrain from using foul language and bad or unlucky words. Negative terms and the word "four" (Ssu), which sounds like the word for death, are not to be uttered. Death and dying are never mentioned and ghost stories are totally taboo. References to the past year are also avoided as everything should be turned toward the New Year and a new beginning.
If you cry on New Year's day, you will cry all through the year. Therefore, children are tolerated and are not spanked, even though they are mischievous.