Children dance in front of anti-smoking banners displayed on the iconic Bird's Nest National Stadium during an event marking World No Tobacco Day in Beijing, capital of China, May 31, 2015. Beijing plans to introduce new regulations on June 1 requiring all indoor public places - and many outdoor public places - to be 100% smoke-free. The legislation is seen as the most rigorous anti-smoking law in China's history. (Xinhua/Shen Bohan)