Could be any of the key players. Maybe it's the mysterious Marcellus Wallace or the charming Pumpkin and Honey Bunny. Without more details, it's tough to make an accurate guess.
Since we have no details about the novel, it's difficult to determine the main characters. However, it could have a lead character who is a scientist passionate about lunar exploration and enters the contest for the sake of discovery. There might also be a rival character who is equally determined to win the contest for their own reasons, perhaps for fame or money.
Knowledge competitions that often appeared in online novels generally referred to a kind of intellectual competition between the experts in the novel. In this kind of competition, participants had to answer a variety of complicated questions and score through voting or discussion. This kind of competition often appeared in novels as a way for characters to interact.
The answer to the Chinese zodiac was a dragon. " The wonders of the world " referred to the dragon. Because among the twelve zodiac animals, only the dragon did not exist in reality, so people thought it was magical. The dragon was one of the most representative animals in Chinese traditional culture and was often used to symbolize auspicious signs.