Cao Jun doesn't like anyone in the TV drama "Building Dreams". He has no feelings. The character of Cao Jun is Shen Qinan who is a junior and partner. He betrayed Shen Qinan in the early stage and assisted Shen Qinan in the later stage. He only exists for Shen Qinan.
When he was a teenager, Shen Qinan drifted to Shanghai and lived by polishing shoes for others. Cao Jun, who was born in poverty, envied Shen Qinan for his good business and ganged up with a group of people to bully him. Shen Qinan and Cao Jun don't know each other without fighting, and they unexpectedly form a deep friendship.
When they grew up, Cao Jun and Shen Qinan went in different directions. Fu Chenglong kills Tian Shiqiu and blames Shen Qinan for everything. Cao Jun took advantage of Fu Chenglong. He clearly knew the truth but said nothing. Fu Chenglong paid for Shen Qinan's life and asked Cao Jun to kill Shen Qinan in the prison. Cao Jun also agreed.
Later, Cao Jun lost his influence on Fu Chenglong and was regarded as an abandoned son by Fu Chenglong. When he was seriously ill and was about to be tortured to death, Shen Qinan, who survived the disaster, saved him in turn, and he was deeply moved. Later, Cao Jun gradually became Shen Qinan's younger brother. Especially since Shen Qinan began to build houses as an architect, he listened to Shen Qinan's orders even more.