People watch a watermelon of about 50 kilograms during a watermelon contest beside the Daminghu Lake in Jinan, capital of east China's Shandong Province, June 15, 2013. A watermelon contest was held here on Saturday, with the biggest watermelon weighing about 50 kilograms. Photo: Xinhua

People grade for watermelons during a watermelon contest beside the Daminghu Lake in Jinan, capital of east China's Shandong Province, June 15, 2013. A watermelon contest was held here on Saturday, with the biggest watermelon weighing about 50 kilograms. Photo: Xinhua