On the bounded index property for products of aspherical polyhedra,

*The 15th East Asian Conference on Geometric Topology**,*On the bounded index property for products of aspherical polyhedra,

*The 13th National Congress of the Chinese Mathematical Society,*Foshan, Nov 23, 2019A brief survey of the Bounded Index Property,

*Workshop on Low-dimensional Topology*, Shanghai Jiao Tong University, Shanghai, Nov 9, 2019A brief survey on Bounded Index Property,

*Nielsen Theory and Related Topics*, KU Leuven Campus Kulak, Kortrijk, Belgium, Jun 6, 2019 Zhang190606.pdfFixed subgroups in low-dimensional manifold groups,

*Workshop between Tianyuan Mathematical Center in Northwest China and Southeast China*, Xiamen University, Xiamen, May 11, 2019Bounds for fixed points on products of hyperbolic surfaces,

*Topology Seminar*, Xi'an Jiaotong-Liverpool University, Suzhou, Jan 17, 2019Bounds for fixed points on products of hyperbolic surfaces,

*East China Workshop on Topology,*East China Normal University, Shanghai, Dec 23, 2018- Bounds for fixed points on products of hyperbolic surfaces,
*The 5th China-Russia Workshop on Knot Theory and Related Topics,*Dalian University of Technology, Dalian, August 4, 2018 - Fixed subgroups in direct products of free and surface groups,
*Geometric and Asymptotic Group Theory with Applications (GAGTA-2018**),*Korea Institute for Advanced Study, Seoul, Korea, July 17, 2018 - Bounds for fixed points on products of hyperbolic surfaces,
KAIST, Daejeon, Korea, Jan 30, 2018 Zhang180130.pdf*The 13th East Asian School of Knots and Related Topics*, - Fixed subgroups in direct products of free and surface groups,
*Workshop on Algebraic and Geometric Topology**,*Nankai University, Tianjin, Jun 21, 2017 Zhang1706.pdf - Fixed subgroups in direct products of free and surface groups,
*The 12th East Asian School of Knots and Related Topics*, University of Tokyo, Tokyo, Japan, Feb 15, 2017 - Fixed subgroups in low-dimensional manifold groups,
*Topology Seminar at PKU,**,*Dec 31, 2016 - Fixed subgroups in low-dimensional manifold groups,
*Topology Seminar at CUHK,**,*Hong Kong, Dec 5, 2016 Zhang1612.pdf - An introduction to right-angled Artin groups,
*Workshop on Geometric Group Theory,*Soochow University, Suzhou, Oct 15, 2016 - Fixed subgroups in direct products of free and surface groups,
*Conference on Algebraic and Geometric Topology,*Capital Normal University, Beijing, July 23, 2016 Zhang160723.pdf Fixed subgroups in direct products of free and surface groups,

*The Third China-Russia Workshop on Knot Theory and Related Topics,*Soochow University, Suzhou, July 11, 2016 Zhang160711.pdfBounds for fixed points on some manifolds,

*International Workshop on Fixed Point Theory and its Applications (IWFPTA-2016),*Chonbuk National University, Jeonju, Korea, Jun 20, 2016 Zhang160620.pdf, IWFPTA-2016-Han.jpgFixed subgroups in direct products of free and surface groups,

*2016 International Conference on Low-Dimensional Topology*, Southwest Jiaotong University, Emei, Sichuan, Jun 15, 2016 Zhang160615.pdfBounds for fixed points on hyperbolic manifolds,

*The 11th East Asian School of Knots and Related Topics*, Osaka City University, Osaka, Japan, Jan 28, 2016 Zhang160128.pdfFixed subgroups in low-dimensional manifold groups,

*Workshop on Manifolds & Groups*, Xi'an Jiaotong-Liverpool University, Suzhou, Jan 24, 2016 Zhang160124.pdfFixed points and fixed subgroups, School of Mathematics and Statistics, Xi'an Jiaotong University, Xi'an, Jan 11, 2016 Zhang160111.pdf

Fixed subgroups are compressed in surface groups,

*Workshop on Low-dimensional Topology*, Dalian Nationalities University, Dalian, Dec 20, 2015 Zhang151220.pdfThe fixed subgroups of homeomorphisms of Seifert manifolds,

*The 10th East Asian School of Knots and Related Topics*, ECNU, Shanghai, Jan 28, 2015 Zhang201501.pdf- Fixed subgroups of free groups and surface groups,
*Topology Seminar at Peking University*, Beijing, Jan 2, 2015 - The group fixed by a family of endomorphisms of a surface group,
*A Satellite Conference of Seoul ICM 2014: Knots and Low Dimensional Manifolds*, BEXCO, Busan, Korea, Aug 26, 2014 Zhang201408.pdf - Bounds for fixed points on Seifert manifolds,
*Workshop on Geometric Topology*, Fudan University, Shanghai, Jul 16, 2012 Zhang120716.pdf - Bounds for fixed points on Seifert manifolds,
*The 8th East Asian School of Knots and Related Topics*, KAIST, Daejeon, Korea, Jan 10, 2012 - Boundary slopes of immersed surfaces in Haken manifolds,
*Workshop on Geometric Topology*, Inner Mongolia University, Hohhot, Jul 3, 2008 - Boundary slopes of immersed surfaces in Haken manifolds,
*The 4th East Asian School of Knots and Related Topics*, University of Tokyo, Tokyo, Japan, Jan 22, 2008 tokyo.pdf