A sales clerk shows a commemorative gold medal featuring the 1911 Revolution in Beijing, capital of China, Aug. 2, 2011. A commemorative medallion set, which includes three gold medals, six silver medals and two bronze medals, has been released nationwide to commemorate the centennial of the 1911 Revolution. This year marks the 100th anniversary of the 1911 Revolution, which began with the Wuchang Uprising on Oct.10,1911. The great revolution led by Dr. Sun Yat-sen led to the collapse of the Qing Dynasty (1644-1911) and brought an end to the imperial rule in China. [Xinhua]