Many Hong Kong shoppers remain undaunted by a mainland Chinese investigation into the food safety practices of popular supermarket Sam’s Club in neighbouring Shenzhen, saying they will still shop for bargains – but more selectively. Despite reports that Chinese regulators had summoned the warehouse retailer over “frequent food safety issues” on Monday morning, the superstore remained busy in the afternoon even with rainy weather. Some Hongkongers who crossed the border to shop were unaware of...