Invited talks at conferences and workshops:

1. Invited speaker, at the MATRIX workshop􀀃on􀀃Uniqueness and Discernment􀀃in􀀃Graph􀀃Polynomials,􀀃Melbourne, 16-27 Oct 2023.

2. Invited speaker, at the 10th International Congress on Industrial and Applied Mathematics, Waseda University, 20-25 Aug. 2023,

3. Invited speaker, at a Special Session on "Recent progress in Chromatic Graph Theory" at the AMS Eastern Sectional Meeting, April 1-2, 2023.

4. Invited speaker, at a Special Session on "Enumerative and Extremal Problems in Chromatic Graph Theory" at the AMS Western Sectional Meeting, May 14-15, 2022.

5. Invited speaker, 11ᵗʰ Conference on Graph Theory and Algebraic Combinatorics, Urmia University, Iran, 4-5 March 2021.

6. Keynote Speaker, at the seminar of Graph Theory and its applications, Institute for Mathematics Research, University Putra Malaysia, 19 April 2019.

7. Plenary speaker, at the 5th International Conference on Mathematics, Science, and Education (ICMSE 2018), Oct 8-9, 2018.

8. Invited speaker, Workshop on Graphs and Knots, June 8-11, 2018, at Xiamen University.

9. Plenary speaker, at the third conference of Combinatorics and Graph Theory at Hunan University, Huanan University, Dec. 9-10, 2017.

10.Invited speaker, at the 8^th Singapore Mathematical Society symposium, Sep. 29, 2017.

11.Plenary Speaker, at the International conference on Combinatorics, Taipei, May 19-22, 2017.

12.Invited speaker, at ``2016 Conference on the advances on Combinatorics and related topic”, Xiamen, Dec. 24-26, 2016.

13.Invited talk, at “Asian Mathematics Conference” in Bali, July 25-29, 2016.

14.Invited speaker, On flow polynomials with real roots only, “International workshops on Knots and Graphs” at Xiamen University, June 24-27, 2016.

15.Principal Speaker, at “Workshop on New Directions for the Tutte Polynomial: Extensions, Interrelations, and Applications” at Royal Holloway University of London, 11th-14th July 2015.

16.Invited speaker, at the 2015 International Conference on Graph Theory at Fuzhou, China, Apr 18-20, 2015.

17.Invited speaker, at International Symposium on Graph Polynomials and their applications, Xiamen University, China, June 27-29, 2014.

18.Invited speaker, at “International Conference on Mathematical Chemistry 2010”, Xiaman University, Aug 4-7, 2010.

19. Invited speaker, at “International Symposium on Graph Theory and Combinatorial Algorithms (GTCA'2010)”, Chinese Academy of Sciences, Beijing, July 11, 2010.

20. Invited speaker, at “International Workshop on Graph Theory with Applications” in Beijing Jiaotong University, China, Dec. 6, 2008.

21.On the Distribution of Complex Zeros of Chromatic Polynomials, at the Department of Mathematics of Xiamen University, China, Nov. 15, 2008.

22. Keynote speaker, at the Program “Combinatorics and Statistical Mechanics” in Isaac Newton Institute of Mathematical Sciences, University of Cambridge, UK, June 24, 2008.

23. Keynote speaker, at the Program “Combinatorics and Statistical Mechanics” in Isaac Newton Institute of Mathematical Sciences, University of Cambridge, UK, May 21, 2008.

24.Keynote speaker, at the Program “Combinatorics and Statistical Mechanics” in Isaac Newton Institute of Mathematical Sciences, University of Cambridge, UK, Jan 22, 2008.

25. Invited speaker, one-day seminar at the department of mathematics, University of Malaysia, April 3, 2007.

26.Invited speaker, at the international conference on Applied Combinatorics and Graph Theory at Xiamen University, China, Dec 21-24, 2006.

27. Invited spaker, at the workshop of discrete mathematics at Fuzhou University of China, April, 2006.

28. Invited speaker, at the conference of Logic and computation (Liu Shenglie’s Lectures) in Kunming, May, 2005.