In order to promote the communication and cooperation between Chinese scientists on analytical chemistry all over the world, the Fourth International Symposium of Worldwide Chinese Scholar on Analytical Chemistry (ISWCSAC 2006) will be held from September 22-27, 2006, in Dalian, China, organized by Chinese Chemistry Society and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. 2) Magnetic resonance ;. 3) Electroanalytical chemistry;. 5) Mass spectroscopy;. Prof Dr. Lihua Zhang.