Riddle:
Riddles mainly refer to the innuendo of things or words for people to guess, and can also be extended to things with mysteries. The riddle originated from the ancient folk in China, and it has evolved for thousands of years. It is a cultural product created by the collective wisdom of the ancient working people in China. On June 7th, 2008, Riddle was approved by the State Council to be included in the second batch of national intangible cultural heritage list.