It is said that the custom of the Chinese New Year started in the last month of the Chinese lunar calendar when people offered sacrifice to their ancestors.At that time，people prepared the sacrifice by doing thorough cleaning，having bathes and so on.Later，people began to worship different deities as well on that day.The sacrificing time changed according to the farming schedule and was not fixed until the Han Dynasty (202 BC－220 AD).The custom of worshipping deities and ancestors remains even though the ceremonies are not as grand as before.It is also the time that spring is coming，so people hold all kinds of ceremonies to welcome it.