This video features some tips and ideas from Kong Linghui (and Zhang Yining in some parts) in the overall game -- some basic drives, loops, services, his ideas on production of power and footwork.
http://www.megaupload.com/?d=J1SJBJ4QIt's been posted before, but it's somewhere deep in the forums, I just wanted to bring it up once more.
He has one of the more compact forehand loops in the game, and has a simple service motion with quite a bit of variety.
Simple, but very consistent attacking game exploiting the angles and the middle.