Oil painting Strangerby Wang Yidong is on display during the media preview of Christie's Shanghai 2014 spring auction in Beijing , April 18, 2014. The preview will go to Shanghai on April 24, and the auction will be held there on April 26. Offering over 60 well-selected pieces, the auction is estimated to realize in excess of 93 million yuan (US$15 million). Works by art ists such as Zao Wou-Ki, Liu Wei, Andy Warhol, Pablo Picasso and Bernard Buffet are among the highlights. [Photo by Bi Nan/chinadaily.com.cn]