Sotheby’s 20th Century Painting sale brought in HK$137m ($17.7m) Those strong numbers were tempered by resistance at the top of the market where all of the highest value lots by Sanyu, Zao Wou-ki and Liao Chi-Chun sold at the very low end of the estimate range. Even with that restraint there were big pops for a lower value Zao, Wu Guanzhong and Chu Teh-Chun: