Sales of cold-chain foods in US supermarket Costco and German retailer Metro supermarkets in Shanghai proceeded as normal on Wednesday afternoon. In Costco, a number of imported cold-chain foods were on sale, including some with prices reduced by about 15 percent. Many frozen foods were also on sale at Metro. A staffer at Costco told the Global Times that the discounts were related to the recent COVID-19 outbreaks. Photos: Yang Hui/GT