Lin Chen and his wife Yang Tingting have been married for three years and embarked on the journey with the excitement of a surprise trip for their third anniversary. On the train, after Lin Chen drank warm milk, he lay down on the middle berth of the train. In the early morning, he accidentally discovered that his wife Yang Tingting on the upper berth was having an affair with a strange man. He calmly took photos of the evidence and sent it to relatives and friends, then turned around and boarded the train away from the betrayal.
