As of 5 p.m. Saturday, 43 close contacts had been quarantined in designated places and 109 were under observation at home, according to the Harbin epidemic response headquarters.
The United States remains the nation hit the worst by the pandemic, with the world's highest caseload and death toll, accounting for nearly 20 per cent of the global deaths.
The Russian chief arms control negotiator also noted that Russia would refuse any agreement on the New START that was timed to coincide with the US presidential election.
China claims sovereignty over virtually the entire South China Sea, which is also claimed in whole or in part by Taiwan, the Philippines, Brunei, Malaysia and Vietnam.