SHANGHAI - A Chinese navy plane crashed on a training mission over the eastern oastal province of Zhejiang, the official Xinhua news agency said Friday, but did not say if there were casualties. The military plane crashed late Thursday night in a mountainous area near the city of Yiwu, it said. Xinhua said the plane belonged to the navy’s East China Sea fleet while the military news channel of the Sina website quoted sources as saying the aircraft was a fighter-bomber JH-7 “Flying Leopard”.