Chinese painting master Wu Guanzhong passes away

This file photo taken on April 6, 2004 shows a piece of Chinese painter Wu Guanzhong's painting. Wu, the master of Chinese painting, passed away at 11:57 p.m. on Friday in a hospital in Beijing at the age of 91. Wu, born in 1919, is a native of Yixing, Jiangsu Province, east China.[Xinhua]