A 35-year-old dissident who served jail time for wearing T-shirts likening Chinese leader Xi Jinping to Hitler fled to South Korea in a daring 300-kilometer (185-mile) escape over the sea by jet ski. The ethnic Korean activist turned up in the South Korean port of Incheon and turned himself in, saying he had entered the country illegally to avoid political persecution and surveillance by Chinese authorities. The escape came as Beijing grapples with a mass “run” movement of people leaving China in recent months.