Bottles of Nongfu Spring water line shelves in a supermarket in Yichang, Central China's Hubei Province Tuesday. The International Finance News reported Tuesday that the mineral water producer was recently found using a quality standard from East China's Zhejiang Province for its products made and sold in South China's Guangdong Province. The standard allows higher levels of fungi and yeasts, and Nongfu's practice may have violated Guangdong food safety regulations, the newspaper reported. Photo: CFP