AFTER MONTHS of political tug-of-war and sometimes bloody demonstrations by farmers, South Korea Friday ratified the GATT agreement on world trade . . . HONG KONG on Friday sent home 247 Vietnamese refugees on a voluntary repatriation flight to Hanoi, bringing the total number of returnees for 1994 to 5,212 . . . WASHINGTON has suspended talks with Beijing on protecting copyrights and patents, two weeks before a deadline that could trigger trade sanctions against China, a senior U.S. trade official said . . . AN EARTHQUAKE with a preliminary magnitude of 5.6 rocked the eastern province of Irian Jaya Friday. There were no immediate reports of damage or casualties.