Former Hong Kong media boss Jimmy Lai Chee-ying has decided not to appeal against his conviction and 20-year jail sentence imposed in a landmark national security trial.A legal source on Friday confirmed that Lai, 78, would not file an application to the Court of Appeal before the usual 28-day deadline for lodging an appeal in criminal proceedings expires on Monday.While Lai can still file an appeal after the deadline, he must give compelling reasons as to why he cannot do so within the time...