What happened to Du Cheng, the little devil in troubled times?

Sue and Du Cheng live a happy life. The Little Devil on Earth is a romantic novel, which tells the love story of Ducheng and Sue. The ending of the novel is that after all kinds of twists and turns, the feelings between Sue and Ducheng resonate, and they finally come together and live a happy life. Du Cheng also grew up slowly in this process, learned to face himself and life, and became a more mature and complete person.