A visitor walks past a rare blue and white facetted moonflask from the Yongzheng period (1723-1735), which is estimate to worth HK$10-15 million (US$1.3 - $1.9 million) at the Christie’s Hong Kong Autumn Auction 2010, on display during a preview in Beijing. Hong Kong is staging a series of auctions this month aimed at tapping mainland Chinese buyers’ growing wealth, with Sotheby’s autumn sale alone expected to rake in over $200 million.