A Chinese national flag flies as students practice Taichi on a playground of a high school, during a Guinness World Record attempt of the largest martial arts display, on a hazy day in Jiaozuo, Henan province, China, October 18, 2015. The city successfully set the record by organizing over 50,000 residents to practise shadow boxing simultaneously at 15 different locations on Sunday morning, local media reported. (Photo by Reuters/Stringer)
