Spring Festival falls on a different date each year. According to the lunar calendar, it's dictated by the first new moon closest to the beginning of spring.
中国的春节每年的日期都不一样。根据农历,春节的具体时间是最接近春天开始的第一个新月日。
春联(Paper scrolls)
Paper scrolls are normally put up on both sides of the doorway. There are certain strict rules to mirror the words, like if there is a character on the left-hand side that saying, sky, for example, there should be one on the right-hand side saying ground, and if there is rain, there is wind. If there is red, there is green. So it is kind of a thing that brings good blessing and good wishes for the New Year.
No medicine on the first day of the lunar New Year, because it is believed that if you take any medicine on the first day of the year, you will be ill all year. That is no good.
农历大年初一不能吃药,据说如果你在初一吃了药,你全年身体都会不好。这可不妙。
Rule two, no porridge.
第二条,不能喝粥。
It is a peasant food and you will be eating poor food and be poor all year if you eat porridge on the first day of the year.
据说粥是以前乡下人吃的东西,吃了穷人的东西就会变穷,新年第一天喝了粥,一年都可能会穷。
Rule three, no sweeping.
第三条,不能打扫卫生。
Because it means you are sweeping away the wealth of the new year to come. Make sense.