Chinese New Year is generally considered to be the largest and most significant cultural event for the Chinese community. As such, many traditions and practices arose around the festival, with many ancient rules put in place ages ago. In addition to those rules, there are also lots of taboos that have been observed, with superstitious people taking great care not to violate them.
Simply put, the Chinese believe that, as the Spring Festival is the start of a new year, what you do during this period can affect your luck in the coming year.
There are some typical taboos that the Chinese will usually avoid doing during the Chinese New Year as shown in the poster above. Some of the taboos are specified only for the first day of the Chinese New Year while some may sustain till the Lantern Festival, namely the last day of the Chinese New Year.