Teenagers from Luohu District and Hong Kong visit an exhibition of navy ships during the Shenzhen-Hong Kong Teenagers’ Marine National Defense Education activity in Luohu District on Sunday. More than 500 students from 15 schools in Luohu and nine schools in Hong Kong attended the activity, which was organized to mark the 70th anniversary of the founding of the Chinese People’s Liberation Army (PLA) Navy. A seminar on national defense, an exhibition of models of PLA Navy fleets and other related events were held during the activity. The national PLA Navy Day is observed April 23. Liu Yujie