Red tourism refers to the revolutionary memorial site since the founding of the Communist Party of China in 1921, the monuments and the revolutionary spirit carried by them are attracted to organize tourists to visit and realize the learning of the revolutionary spirit, receive revolutionary traditional education and inspire Spiritual, relaxing body and mind, increased tourism experience. According to the above definition, which of the following is not a characteristic of red tourism? ['Learning.', 'Story.', 'Participation.', 'Fun.']