China The southern city of Shenzhen closed the world's largest electronics market and suspended public transport nearby as authorities impose restrictions across the area in response to low numbers COVID-19 cases.Huaqiangbei, a bustling shopping district with thousands of stalls selling computer components, mobile phone parts and microchips, is among three neighborhoods placed under a mandatory four-day quarantine in Futian District on Monday, according to the district government.Residents in these areas are prohibited from leaving their homes, with the exception of testing for COVID-19, which they must undergo daily until Thursday.An aerial view of the Huaqiangbei commercial shopping district in Shenzhen…