Dennis in this story could be a character with a lot of knowledge about crawdads and the area around the bus route. Maybe he's an old - timer who has seen many things related to the crawdad bus over the years and loves to share his stories with others. He could be a fisherman who uses the crawdad bus to get to his favorite fishing spots and has tales to tell about his adventures along the way.
'Originally, I was a guest who did not return, but the moon shines on the ditch' was a famous sentence in the Qing Dynasty's Dream of the Red Chamber. This sentence came from chapter 87, describing Jia Baoyu's heart full of pain and loneliness after Lin Daiyu's death. From Jia Baoyu's perspective, this sentence described his inner contradictions and pain, expressing the impermanence of life and the ruthlessness of everything in the world. It was also one of the most representative lines in 'Dream of the Red Chamber'.
It could be that he showed great determination and effort, outshining the others in the competition to win the lamp. Maybe he had some special skills or knowledge that gave him an edge.