Hong Kong police are searching for a 76-year-old man who went missing in Ma On Shan on Wednesday.Liu Yim-kwan left his home at Yan On Estate on Hang Chi Street in the small hours Wednesday and failed to return, police said on Thursday.Liu is about 1.7 metres tall with a lean build. He has short black hair and a sallow complexion.He was last seen wearing a black jacket, black trousers and white trainers.His family reported him missing on Wednesday.The force appealed to anyone with...