Bayannuur peonies bloom during May Day holiday

Visitors photograph blossoming peonies at a park in Bayannuur, Inner Mongolia autonomous region on April 29. International Workers' Day, also known as Labor Day, is a celebration of the rights earned through international labor movements over many decades. The day is an official holiday in dozens of countries. In China, what was once a weeklong holiday is now celebrated over three days. [Photo/Xinhua]