Radio-controlled sailing boats sail around race marks in the Maojiabu water area of the West Lake in Hangzhou, capital of east China's Zhejiang province, Aug 4, 2013. The two-day radio-controlled sailing boats West Lake open, which ended on Sunday, attracted nearly 100 contestants in over 10 representative teams all over China. The event is part of the 2013 China national marine model series. [Photo/Xinhua]