The lion, a symbol of power, wisdom, and good fortune, chases away evil spirits and brings hapiness, longevity, and good luck.
The lion dance is usually accompanied by a musical ensemble consisting of a large chinese drum (called a da shih gu) played with two wooden mallets, a gong (called luo), and one or more sets of cymbals (called bo). The lion's dance is not choreographed to music; instead the musicians follow the lion's movements. Each of the lion's moods and moves has its own associated rhythm.
Firecrackers are widely used during Chinese New Year because it is believed the bright lights and the noise can scare away evil spirits like Nian. It was believed that Nian is a monster that would awake only during the Lunar New Year and would devour men and animals in its path. People used to light a pile of bamboos on Chinese New Year to scare away Nian. When gun powder was invented, it was added to the bamboos, causing loud bangs. With Nian and the other evil spirits scared off, it is believed that prosperity, good health and happy relationships will fill the year.