SHANGHAI, Oct. 20, 2012 (Xinhua) -- Participants start from the ground floor of the Shanghai World Financial Center (SWFC) to take part in a climbing activity in east China's Shanghai Municipality, Oct. 20, 2012. About 300 participants attended the activity by climbing 2,754 steps to arrive at the sightseeing hall of the SWFC with a height of 474 meters. (Xinhua/Liu Ying)