SHANGHAI, June 9, 2012 (Xinhua) -- Customers buy shoes in a department store in Shanghai, east China, June 9, 2012. China's consumer price index (CPI), a main gauge of inflation, slowed to 3.0 percent year-on-year in May, the National Bureau of Statistics (NBS) said Saturday. It marked a 17-month-low, easing from April's 3.4 percent and 3.6 percent in March. (Xinhua/Liu Ying)