Shop manager Zhao Heng leaps into action when he is asked about the availability of imported meat products, eager to convince customers that they will soon be back on the shelves.His food retail outlet on Shanghai’s Lancun Road, called Master, took a hard knock from the Covid-19 pandemic, particularly after the virus was detected on packaging of imported seafood at Beijing’s Xinfadi wholesale food market in June.With Chinese consumers now fearful of tainted food shipped from abroad and a…