Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11375072, 11221504, 11175232]; Chinese Ministry of Science and TechnologyMinistry of Science and Technology, China [2014DFG02050]; Office of Energy Research, Office of High Energy and Nuclear Physics, Division of Nuclear Physics, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]; JET Collaboration