China is a vast country with a long history and diverse cultures, so the customs and activities vary in different areas. Among them, eating Yuanxiao, watch lanterns, guess lantern riddles, lion dance and dragon dance are the most important and prevalent ones. Hangzhou, the political center of the Southern Song Dynasty), witnessed the flourish of making and guessing lantern riddles during people's appreciation of lanterns. People wrote riddles on paper notes and pasted upon the colorful lanterns. If visitors think they have the right answers to the riddles, they could pull the paper out and went to the lantern owners to check their answer. If they were right, they would get small gifts. As riddle guessing is interesting and informative, it has become popular among all social strata.