HONG KONG – Britain’s White Cube gallery, known as an early champion of provocative British artists Damien Hirst and Tracey Emin, launched its Hong Kong branch on Thursday, becoming the latest Western gallery to open an Asian outpost in pursuit of China’s booming art market. White Cube unveiled a 6,000-square-foot (557-square-meter) space in a new building in Hong Kong’s central business district. With its first branch outside Britain, White Cube follows other British as well as French and American galleries that have set up shop in Hong Kong in recent years. As their home markets plateau, they’re pinning hopes for future growth on Asia, particularly China, where a strong economy has been minting millionaires at a rapid clip. The arrival of White Cube in Hong Kong underlines the sophistication and increasing influence of the region’s art collectors. Founded in 1993, White Cube has had a long association with Hirst and Emin, the most prominent of a group known as the Young British Artists that emerged in the 1990s.