Why do three puppies travel to Xiangshan with 1 yuan and stay in a hotel at night?

Without 1 yuan, it's a fairy tale for three puppies to travel to Xiangshan and stay in a hotel at night. According to relevant information, the three puppies traveled to Xiangshan together and stayed in a hotel at night. The boss charges each puppy like his mother 10 yuan. Later, the mother elephant felt that it was not easy for the three puppies to go out, so she asked the assistant bear to return 5 yuan.