Beyond trade, cooperation between ASEAN and China can also be stepped up in areas such as connectivity and the green economy, says Singapore Prime Minister Lawrence Wong.   KUALA LUMPUR: Southeast Asian and Chinese leaders should move swiftly to ratify an upgraded free trade agreement signed on Tuesday (Oct 28) so businesses and citizens can begin reaping its benefits, said Singapore Prime Minister Lawrence Wong. Speaking at the Association of Southeast Asian Nations (ASEAN) and China summit in