In part 4 of the series, the indomitable Detective Li and his faithful partner Xiao You find themselves summoned to the scene of a burglary... in a circus. Listen in to the details of the case, and see if you can match wits with Detective Li and determine who committed the crime. [上集答案：根据条件，没有说谎的孩子是毛毛。打破玻璃的孩子是星星。]