Yang 's first decade in Europe was a period of introspection and reinvention of identity , as reflected in his series of large monochrome black ink paintings , the '' Hundred Layers of Ink '' ( 1988 – 1999 ) . After the shock of the September 11 attacks , these monochrome meditative inks were superseded by figurative paintings and videos referencing critical subjects and actual events
September 11 attacks
September 11 attacks
Yang Jiechang