- Logic Seminar, Kurt Gödel Research Center for Mathematical Logic, Vienna, Austria, March 2014.
- Workshop on Metamathematics and Metaphysics, Fudan University, Shanghai, China, June 2013.
- Contributed Talk, AMS-ASL Joint Meeting, San Diego, United States, January 2013.
- Logic Seminar, University of Wisconsin, Madison, United States, December 2012.
- Logic Seminar, Cornell University, United States, September and November 2012.
- Twelfth Asian Logic Conference, Victoria University of Wellington, New Zealand, December 2011.
- Logic Forum, Renmin University, Beijing, China, December, 2011.
- Logic Seminar, National University of Singapore, frequent speaker, September 2009 - December 2013.
- The Fifth Mathematics and Physical Sciences Graduate Congress, Chulalongkorn University, Thailand, December 2009.