** Teaching:**

- 2020 Summer Semester, Exercise courses to Discrete Mathematics (two groups) in German.

** Talks:**

- September 17, 2019, talk title: '
*Exact and asymptotic enumerations of ascent sequences and Fishburn matrices',*Minisymposium on enumerative and algebraic combinatorics, ÖMG (Austrian Mathematical Society)-conference, Dornbirn, Austria. - March 27, 2019, talk title: '
*Random k-trees and Brownian Continuum Random Tree',*Department of Mathematics, Xiamen University, Xiamen, China. - March 26, 2019, talk title: '
*Heaps and Two Exponential Structures',*Department of Mathematics, Jimei University, Xiamen, China. - March 22, 2019, talk title: '
*Random k-trees and Brownian Continuum Random Tree',*Department of Mathematics, Zhejiang Normal University, Jinhua, China. - March 13, 2019, talk title: '
*Analytic methods in some combinatorial problems',*Center for Combinatorics, Nankai University, Tianjin, China. - February 21, 2019, talk title: '
*Exact Enumeration and asymptotics of Fishburn objects',*Workshop on Combinatorics and Graph Theory, Institute of Mathematics, Academia Sinica, Taipei. - November 13, 2018, talk title: '
*A new decomposition of ascent sequences and Euler--Stirling statistics',*Arbeitsgemeinschaft Diskrete Mathematik, TU Wien. - April 17, 2018, talk title: '
*A new decomposition of ascent sequences and Euler--Stirling statistics',*NCTU, Hsinchu, Taiwan. - April 13, 2018, talk title: '
*Fishburn family and Euler--Stirling statistics',*Institute of Statistical Science, Academia Sinica, Taiwan. - November 1, 2017, talk title: '
*strips, thickened strips and Schur function determinants',*National Taiwan University, Academia Sinica, Taipei, Taiwan. - June 13, 2017, talk title: '
*Graph limits of random k-trees',*in der Arbeitsgemeinschaft Diskrete Mathematik, TU Wien. - February 21, 2017, talk title '
*A note on the scaling limit of Random Polya trees',*National Chiao Tung University, Hsinchu, Taiwan. - September 21, 2016, talk title: '
*Graph limits of random graphs from a subset of connected k-trees',*Combinatorics and Graph Theory Session of the joint conference of Austrian, Czech, Slovak, Slovenian and Catalonian Mathematics Societies, Barcelona, Spain. - September 12, 2016 talk title: '
*Outside nested decompositions of skew diagrams and Schur function determinants',*77th Séminaire Lotharingien de Combinatoire, Strobl, Austria. - September 6, 2016, talk title: '
*open problems on the hook-length formula for skew shapes',*ALEA in Europe Young Researcher's Workshop, TU Wien, Vienna, Austria. - June 28, 2016: talk title: '
*Outside nested decompositions of skew diagrams and Schur function determinants',*in der Arbeitsgemeinschaft Diskrete Mathematik, TU Wien. - January 11, 2016: talk title: '
*Scaling limit of random k-trees',*at the conference Analco 16, Arlington, USA. - June, 2015, talk title: '
*Heaps and Two Exponential Structures',*in der Arbeitsgemeinschaft Diskrete Mathematik, TU Wien. - Oct., 2014, talk title: '
*An asymptotic analysis of unlabeled k-trees',*in der Arbeitsgemeinschaft Diskrete Mathematik, TU Wien. - June, 2014, AofA 14, talk title: '
*An asymptotic analysis of unlabeled k-trees',*25th International Meeting on Probabilistic, Combinatorial and Asymptotic Methods for the Analysis of Algorithms, Paris, France. - January 2012, talk title: '
*The expected order of saturated secondary structures',*SIAM-ANALCO 12, (SIAM-meeting on Analytic Algorithmics and Combinatorics 2012), Kyoto, Japan. - July 2009, talk title: '
*Random induced subgraphs of Cayley graphs induced by transpositions',*the 5-th Graph Theory and Combinatorics across Taiwan straits, Center for combinatorics, Nankai University, Tianjin, China. - July 2008, talk title: '
*RNA pseudoknots structures',*the 9-th Annal Conference of Mathematical Biology, University of Toronto, Canada.

** Visiting Experiences:**

- September 16--20, 2019, ÖMG (Austrian Mathematical Society)-conference, FH Vorarlberg, Dornbirn, Austria.
- March 15--28, 2019, Jimei Univerisity, Xiamen, China.
- March 13, 2019, Nankai University, Tianjin, China.
- February 11--March 10, 2019, Academia Sinica, Taipei.
- October 29-30, 2018, MOST (Taiwan) -- ANR (France) -- FWF (Austria) workshop, TU Wien, Vienna, Austria.
- September 9-12, 2018, 81th Séminaire Lotharingien de Combinatoire (Krattenthaler 60th Birthday), Strobl, Austria.
- July 2--6, 2018, Institute of Discrete Mathematics, TU Graz, Austria.
- June 25--29, 2018, AofA, Uppsala University, Sweden.
- April 9--May 9, 2018, Academia Sinica, Taiwan.
- March 25-28, 2018, 80th Séminaire Lotharingien de Combinatoire, Lyon, France.
- March 23, 2018, Deutsch C1-Prüfung, bestanden, München, Germany.
- November 13-17, 2017, Programme on Computer Algebra in Combinatorics, Erwin-Schroedinger International Institute for Mathematics and Physics, Vienna, Austria.
- November 1, 2017, National Taiwan University, Taipei, Taiwan.
- October 30-31, 2017, Young researchers workshop, Academia Sinica, Taipei, Taiwan.
- October 27-29, 2017, FWF(Austrian)-MOST (Taiwanese) Project meeting, NCTU, Hsinchu, Taiwan.
- October 16-20, 2017, Programme on Algorithmic and Enumerative Combinatorics, the Erwin-Schroedinger International Institute for Mathematics and Physics, Vienna, Austria.
- October 9-13, 2017, Alea in Europe. TU Wien, Austria.
- September 10-13, 2017, Seminaire Lotharingien de Combinatoire, Centro Residenziale Universitario di Bertinoro, Italy.
- August 28--September 1, 2017, EuroComb 17, TU Wien, Vienna, Austria.
- June 19-23, 2017, AofA 2017, Princeton University, USA.
- June 7-8, 2017, Two short courses on algebraic combinatorics, University of Coimbra, Coimbra, Portugal.
- May 22-26, 2017, Summer School on ''Techniques in Random Discrete Structures'', National and Kapodistrian University of Athens, Athens, Greece.
- April 29, 2017, B2-Prüfung, bestanden. Goethe-Institut, München, Germany.
- February 20--March 3, 2017, Sinica, Taipeh, Taiwan.
- November 28-30, 2016, SFB-meeting, Strobl, Austria.
- October 7, 2016, SFB-Project extension hearing, poster. Hilton Hotel, Vienna, Austria.
- September 20-23, 2016, Combinatorics and Graph Theory Session of the joint conference of Austrian, Czech, Slovak, Slovenian and Catalonian Math. Societies, Barcelona, Spain.
- September 12-14, 2016, 77-th Séminaire Lotharingien de Combinatoire, Strobl, Austria.
- September 6-9, 2016, ALEA in Europe Young Researcher's Workshop, TU Wien, Vienna, Austria.
- August 1-5, 2016, the 3rd Algorithmic and Enumerative Combinatorics Summer School, RISC. Hagenberg, Austria.
- July 4-7, 2016, AofA 16, the 27th International Meeting on Probabilistic, Combinatorial and Asymptotic Methods for the Analysis of Algorithms, Krakow, Poland.
- Feb. 22-25, 2016: Alea in Europe School 2016, Ludwig-Maximilians-Universität, München.
- Jan. 29, 2016: SFB-meeting, Johannes Kepler Universität, Linz, Austria.
- Jan. 11, 2016: ANALCO 16, Meeting on Analytic Algorithmics and Combinatorics, Arlington, Virginia, USA.
- Nov. 30-Dec. 2, 2015, SFB Seminar, Strobl, Austria.
- August 25-27, 2015, 2015 Joint Austrian-Hungarian Mathematical Conference, Györ, Hungary.
- July 27-31, 2015, the 2nd Algorithmic and Enumerative Combinatorics Summer School, RISC. Hagenberg, Austria.
- June 26, 2015, Goethe-Institut, München, B1-Deutschprüfung, bestanden mit Note 'gut', Germany.
- June 8-12, 2015, AofA 15, the 26th International Meeting on Probabilistic, Combinatorial and Asymptotic Methods for the Analysis of Algorithms, Strobl, Austria.
- May 27-29, 2015, Seminar on restricted lattice paths, RISC, Hagenberg, Austria.
- February 23, 2015, Goethe-Institut, Mannheim-Heidelberg, A2-Deutschprüfung, bestanden mit Note 'gut'.
- October 6-24, 2014, the Institute of Discrete Mathematics and Geometry, Vienna, Austria.
- March 22-26, 2014, Seminaire Lotharingien de Combinatoire, Institut Camille Jordan, Universite Claude Bernard Lyon 1, Lyon, France.
- November 18-29, 2013: the Institute of Discrete Mathematics and Geometry, Vienna, Austria.
- September 15-18, 2013: Seminaire Lotharingien de Combinatoire, Centro Residenziale Universitario di Bertinoro, Italy.
- July, 2013: FPSAC, Formal power series and algebraic combinatorics, Paris, France
- March, 2012: Visit the department of Mathematics and Computer Science, Southern Denmark University, Odense, Denmark.
- January, 2010, Visit the Postec, Pohang, South Korea.