There are three Type052D and two Type055 Destroyers (totaling to five) under construction at Dalian shipyard alone side with "Shandong" China's second aircraft carrier. Photo credit (here). Additionally, there are yards in Shanghai and Guangdong producing surface combatants for the China Navy (tm) in parallel, all indicating that 2018 will be another dumpling-making year.
Nuclear subs are manufactured at Huludao in Liaoning, not too far from Dalian. The inland city of Wuhan is generally responsible for building conventional submarines.