Chinese emperors worshipped Heaven God in Chinese New Year. They held addtionally extra Heaven God worships when they thought it was necessary. For instanser, In Ming and Qing dynasties, the emperors worshipped Heaven God also on every winter solstice. The famous Heaven Temple in Beijing was the place to hold the grand royal worships to Heaven God on the winter solstices.
Ancient Chinese belived worshipping was the way to communicate with Heaven God. They presented meat, corn, fruit, flowers, etc to Heaven God on the worship ceremonies to express their reverence, and hoped that Heaven God would fullfill their wishes. It was also belived that an emperor was a representor of Heaven God, and the prays of an emperor would most possibly heard by Heaven God.