"'It was an amazing golden age,' reflects Guillaume Brochard of Qeelin, a Chinese jeweller. From 2007 to 2011 many luxury-goods firms enjoyed double-digit annual growth in China, which became their most important market. The first blows came last year, with an economic slowdown and jitters about the political transition. Now, a crackdown on corrupt gift-giving and a populist backlash against ostentation have added to the woes."