U.S. PRESSES CHINA OVER SUSPECTED NUCLEAR TESTS The Trump administration has been quietly holding talks with China over allegations Beijing conducted secret low-yield nuclear tests and concerns about its rapidly expanding nuclear arsenal. China strongly denies violating the 1996 nuclear-test-ban treaty. Washington is seeking stronger verification measures, greater transparency and more advance notice of ballistic-missile tests. The discussions currently focus on reducing nuclear risks rather than formal arms-control limits, with further talks expected next month.(彭博社)