I'm still gathering details on this, but GM Zhang on 11/27 in Beijing. His funeral was on 11/29 at the Beijing Muslim Cemetery.
Zhang Wenguang was a 9th duan master and the teacher of Wu Bin. In our upcoming issue, January February 2011, there's a list of all the 9 duan masters. When we went to press, there were only two 9 duan masters who were deceased.
Sadly, I never met GM Zhang. Neither did our publisher, Gigi Oh.