A tree is blown down by wind on a sidewalk in Hangzhou, capital of east China's Zhejiang Province, Aug. 6, 2012. The National Meteorological Center said Haikui, the 11th tropical storm of the year, has entered the East China Sea and is approaching Zhejiang Province. The provincial meteorological authority has issued a yellow alert against the typhoon at 10:58 Monday. [Xinhua]