News at Seven-Thirty highlights: a mentally-illed man killed a boy and hurt his father in a knife attack; government has unveiled changes to its medium-of-instruction policy; all members of Association of Hong Kong Chinese Middle Schools resigned in protest against the medium-of-instruction policy shift; five more imported H1N1 flu cases were confirmed today; China has reported it first suspected domestic case of H1N1 flu; South Korea bade an emotional farewell to Roh Moo-hyun; Chinese fishing boats pulled away from North Korea’s coast amid heightened military tensions; HK government hopes to strike a deal for visa-free entry to the U.S. for SAR passport holders; Urban Renewal Authority annouced plans for a 6-million-dollar redevelopment project in To Kwa Wan.