Authorities in the northeastern Chinese city of Harbin further tightened restrictions on inbound traffic and private gatherings on Wednesday to contain its second wave of coronavirus infections blamed on imported cases.Harbin, the capital of Heilongjiang Province with a population of some 10 million, has banned all nonresidents and their vehicles from entering residential compounds, according to local authorities.In order to go in and out of their guarded residential areas, locals must have a guard scan a QR code on their smartphone, with the color green indicating a COVID-19 risk-free stat…READ FULL ARTICLE