A patient undergoes cupping treatment at a weight loss centre in Changchun, northeast China's Jilin province June 21, 2010. Cupping treatment involves creating negative pressures within glass containers, which are then inverted and placed onto the back of a patient. Doctors believe the technique is able to cleanse the body of impurities and improve blood circulation as well as the flow of "qi", known as the body's "vital energy" in Mandarin. [Agencies]