Same-store sales slid 11 percent in Hong Kong versus a 5 percent increase in mainland China in the three months that ended December 31, the company said. Gold same-store sales dropped 11 percent across the group, while for gem-set jewelry the rate of decline was 4 percent. The figures only include retail sales at Luk Fook’s self-operated stores, which include 47 locations in Hong Kong, 10 in Macau and 129 in mainland China.