Source: China – South China Morning PostChina’s southern city of Shenzhen remains on high alert after a further four new Covid-19 cases – one of them asymptomatic – were uncovered on Tuesday night, doubling the day’s previously reported tally.The new infections are a blow to neighbouring Hong Kong’s hopes that its closed border with the mainland will reopen any time soon. Health officials have already warned the long-awaited opening would be postponed until the outbreak is under control.Beijing reluctant to reopen Hong Kong border…Read More