Small businesses around the Chinachem Tower in Hong Kong’s Central were dealt a blow after the building was engulfed in flames, with some stores remaining shut on Sunday morning as the investigation into the cause of the fire entered its second day. Some shop operators described the fire as a rarity in the central business district and a source of concern. Saturday’s blaze took more than four hours to snuff out and enveloped the entire building, which was undergoing renovations. A government...