Two PLA warships departed Hong Kong on Monday morning, concluding a high-profile five-day port call with a ceremony at the naval base on Stonecutters Island.Dozens of residents and visitors lined waterfront areas for a final glimpse of the guided-missile destroyer Nanning and the guided-missile frigate Hengyang as they sailed through Victoria Harbour and the Tathong Channel in eastern waters.Speaking amid heavy rain at the send-off ceremony, Chief Secretary Eric Chan Kwok-ki expressed...