Hong Kong police hold open day for national security education, police force anniversaryChina cuts 88 bln yuan in logistics costs in 2017U.S. stocks tick down as Apple drags tech sector lowerBoom in travel to 'ice city' Harbin spurs sales of cranberry productsEconomy on stable footing, experts sayCuriosity mars rover begins studying Vera Rubin RidgeBIRTV 2017 held in BeijingU.S. stocks post weekly gains amid tax bill, data4th CICPE scheduled from April 13China's second