Economic Cooperation   - ROK trade with China to top $200 bln in 2012 - HK to resume poultry import from S Korea - China becomes top destination of ROK businessmen - HK top commercial official to visit ROK, Japan - ROK exchange to see first overseas debut from China - Chinese premier calls for early creation of free trade zone with S.Korea - Chinese premier says China-S. Korea trade cooperation brings about tangible benefits - Trade with ROK to get "big boost" - China-ROK trade estimated to top 130 bln USD in 2006 - China, Japan, S Korea agree on closer co-op in science, technology - Vice premier calls for closer environmental cooperation among China, ROK, Japan - ROK parliamentarian calls for ferry service between ROK, China - ROK investors seek fortune in W China - China, ROK agree on FTA feasibility study - China, ROK agree to start talks on free trade area - Regular flights between Changsha and Seoul to be opened - China's home-grown 3G technology to have trial network in ROK