XINING, CHINA - JANUARY 27:  A worker works among potted flowers in the greenhouse of the City-south Plant Nursery on January 27, 2007 in Xining of Qinghai Province, China. The nursery covered an area of 26 acres and has a greenhouse with a total of 0.27 acres of green space. With the upcoming Spring Festival and Valentine's Day, the flower trade is expecting a boom. Getty Images logo Getty Images 33 months ago

XINING, CHINA - JANUARY 27: A worker works among potted flowers in the greenhouse of the City-south Plant Nursery on January 27, 2007 in Xining of Qinghai Province, China. The nursery covered an area of 26 acres and has a greenhouse with a total of 0.27 acres of green space. With the upcoming Spring Festival and Valentine's Day, the flower trade is expecting a boom.