Hong Kong CNN  —  More than 200 kindergarten students in northwestern China were found to have abnormal blood lead levels after kitchen staff used paint as food coloring, authorities said, in a case that’s stoked outrage in a country long plagued by food safety scandals. Eight people, including the principal of the private kindergarten that the children attended, have been detained “on suspicion of producing toxic and harmful food,” according to a report released Tuesday by Tianshui city