China and Japan have re-opened dialogues for finance cooperation.Finance ministers from both countries held a meeting over the weekend, the first of its kind in some three years.According to Chinese finance minister Lou Jiwei, the two sides reached agreement on a number of key areas.In a statement, the finance ministers from the two countries emphasized the need to scale up financial cooperation and support collaboration in the economic, trade and investment fields.So, what does the re-establishment of this dialogue mechanism tell us about the relations between world's second and third largest economies in the near future?How can the China-Japan economic cooperation coexist with competition?