Playing in front of his home fans Chou won the first game but then Chen upped his performance to convincingly win 15-21, 21-9, 21-6.
In the women's singles in an all China final sixth seed Wang Yihan upset number two seed Li Wxerui with a great performance winning 21-10, 21-9.
The mixed doubles final was an all South Korean affair with seventh seeds Ko Sung Hyun and Kim Ha Na beating unseeded duo Shin Baek Choel and Yoo Jung Chae 21-16, 21-18.
In the women's doubles there was an upset when Indonesian fourth seeds Nitya Krishinda Maheswari and Greysia Polii beat second seeded Chinese duo Luo Ying and Luo Yu 21-17, 21-17.
In the men's doubles final China's fifth seeds Fu Haifeng and Zhang Nan beat Indonesia's Gideon Markus Fernaldi and Kevin Sanjaya Sukamuljo 21-13, 21-8.