The founders:
Founders: Shaowen Xie, Anran Wu, Fangzhou Gu

ThePresidents, Vice Presidents, Secretary-general and Deputy Secretary-general:
The first term (from 1987-1993)
President: Fangzhou Gu
Vice presidents: Anran Wu, Zhenzhou Long, Qiuzao He, Guizhen Yang, Jingliang Lu
Secretary-general: Shaoxian Chen
Deputy Secretary-general: Weifeng Chen

The second term (from 1993-1998)
President: Denian Ba
Vice presidents: Xihua Zhu, Guizhen Yang, Xiantao Kong, Jingliang Lu, Weifeng Chen
Secretary-general: Weifeng Chen
Deputy Secretary-general: Hongzheng Wang

The third term (from 1998-2002)
President: Denian Ba
Vice presidents: Weifeng Chen, Guangyan Zhou, Boquan Jin, Jingliang Lu
Secretary-general: Xianhao Xu
Deputy Secretary-general: Hongzheng Wang??

The fourth term (from 2003 to 2006)
President: Weifeng Chen
Vice presidents: Guangyan Zhou, Boquan Jin, Dexian Zheng, Xueguang Zhang
Secretary-general: Wei He
Deputy Secretary-general: Jiayou Lin

The fifth term (from 2007 to 2010)
President: Xuetao Cao????????????
Vice presidents: Boquan Jin, Dexian Zheng, Xueguang Zhang, Feili Gong, Zhigang Tian
Secretary-general: Wei He
Deputy Secretary-general: Jiayou Lin

The Executive Council members of IUIS from CSI:

The first term:
Chairman, Fangzhou Gu
Co-chairman, Anran Wu

The second term:
Chairman: Fangzhou Gu
Co-chairmen: Anran Wu, Zhenzhou Long, Qiuzao He, Guizhen Yang, Jingliang Lu