A doctor prepares plaster applications at the Guangdong Provincial Traditional Chinese Medical Hospital July 3, 2013. According to traditional Chinese medicine, winter illnesses such as chronic bronchitis and rheumatic arthritis can be prevented by applying plaster medicine on certain acupuncture points on the back during the hottest days of the year. Three applications, called "hot summer days plaster medicine" literally in Chinese, should be used respectively every 10 days around the time between the Lesser Heat and the Great Heat, usually between mid or late July to early August. [Photo/Xinhua]