<正>HAVING held the post of general manager of the Laohuizhou Tea Com-pany for seven years, Cheng Chunxian is back at school. She is studying a program spon-sored by the AGRIFFCHINA (China Chamber of Commerce for Import and Export of Foodstuffs, Native Produce and Animal By-Products), the focus of whose courses is on safe, quality tea ex-ports. The reason for Cheng’s renewal of her tea expertise is the sharp dip in her company’s business chart since April 2007, when the European Union in-creased farm chemical residue test items on imported tea to 227.