The Netherlands has taken a swipe at China after a pair of Xi Jinping’s fighter jets circling Dutch naval craft “several times” led to a “potentially unsafe situation” in the East China Sea. Jets from China’s air force had circled a Dutch frigate, HNLMS Tromp, and one of its helicopters while it was on patrol. The Chinese aircraft had left the area, but then later returned alongside a helicopter of their own to harangue the Netherlands’ chopper in international airspace, according to the Dutch defence ministry. The ministry said Tromp had been patrolling in support of UN sanctions against Nort…