A private survey is showing a slowdown in China's key manufacturing sector. <br /> <br />The HSBC flash PMI reading shows a reading of 49.5 for December against a 50 reading last month. <br /> <br />Anything below 50 indicates a contraction. It would be a further indication that the world's second-largest economy is slowing down. <br /> <br />The BBC's Leisha Chi spoke to China specialist Andy Xie in Hong Kong about what's causing it. <br /> <br />Mr Xie was ranked one of the 50 most influential people in global finance last year.
