Reviewer for journals:
- Computational Linguistics (2010, 11, 12, 13, 14, 15, 16, 17, 18)
 - Artificial Intelligence (2019)
 - Neural Computation (2021)
 - Frontiers of Information Technology and Electronic Engineering (2018-[editorial board])
 - Transaction of the Association of Computational Linguistics (TACL) (2015–19[standing review committee]), 2019–[Action editor]])
 - Natural Language Engineering (2012)
 - Computer, Speech and Language (2010, 13, 14, 15, 17, 18)
 - Journal of Artificial Intelligence Research (2015)
 - IEEE Transactions on Affective Computing (2020)
 - IEEE Transactions on big data (2018–[associate editor])
 - IEEE Transactions on Neural Networks and Learning Systems (2020)
 - Frontiers of Information Technology and Electronic Engineering (2018-[editorial board])
 - IEEE/ACM Transactions on Audio, Speech and Language Processing (2013, 14, 15,17, 19, 20)
 - IEEE Transactions on big data (2018-[associate editor])
 - ACM Transactions on Asian and Low-resource Language Information Processing (2011, 13, 14, 16- [associate editor])
 - IEEE Transaction on Learning Technologies (2017)
 - Language Resources and Evaluation (LREV) (2014, 16)
 - Journal of Logic and Computation (2012)
 - Knowledge and Information Systems (2010, 11)
 - Computational Intelligence (2010, 13, 16)
 - the International Journal of Artificial Intelligence (2009)
 - Journal of Computer Science and Technology (2013, 17, 20)
 - Computing and Informatics (2013)
 - Big Data Research (2015)
 - Science China (2020, 21)
 - CAAI Transactions on Intelligence Technology (2020)
 - Lingua Sinica (2015)
 
PC for conferences:
- ACL (2008, 09, 12, 13, 14, 15 [best paper committee, session chair], 16, 17 [area chair], 18 [area chair],19 [area chair for sentiment], 20 [senior area chair; tutorial chair for segmentation], 21 [ area chair for syntax]),)
 - ACL demos (2014)
 - EMNLP (2009, 10, 12 [best reviewer award],13, 14, 15 [area chair],16, 17 [area chair],18, 19 [senior area chair for syntax], 20 [senior area chair for semantics])
 - COLING (2012, 14 [area chair], 16,18[area chair], 20)
 - NAACL (2010, 12, 15 [area chair])
 - EACL (2012, 14, 17) [session chair]
 - AAAI (2012, 16, 17, 18, 19, 21 [senior PC member)
 - IJCAI (2013, 17 [senior PC member], 18 [senior PC member], 19 [senior PC member], 20 [senior PC member], 21 [area chair])
 - IJCNLP (2011, 13 [session chair], 17 [workshop chair])
 - SIGIR (2018)
 - IWPT (2011, 13, 15)
 - ROCLING (2014)
 - CCL (2015, 16 [area chair], 17 [area chair], 18, 19 [area chair], 20 [program chair])
 - NLPCC (2014 [area chair], 15, 16 [area chair], 18 [best paper committee], 19 [student workshop chair])
 - Depling (2015, 17)
 - CLP (2016 [PC chair])
 - IALP (2017 [PC chair], 18, 19)
 - AACL (2020 [area chair for sentiment]
 
Workshops:
- ACL student research workshop (2012, 15 [student mentor], 16, 17)
 - EACL student research workshop (2017)
 - CCL student research workshop (2016)
 - CWMT (2013)
 - SIGHAN (2015 [co-organizer], 17 [PC chair])
 - S2MT (2015 [session chair])
 - CLUK (2008 [session chair])
 - ADIM (2011)
 - ICYCSEE (2015, 16)
 
ACL community:
- IT officer, ACL SIGHAN, Dec 2013-.
 
Reviewer for books and theses:
- External PhD examiner of Dominick Ng (University of Sydney, Australia), 2015.
 - External PhD examiner of Richard Billingsley (University of Sydney, Australia), 2014.
 - Book proposal reviewer for Cambridge University Press, 2013.
 
Reviewer for research grants:
- Reviewer for Netherland Physical Science TOP-Grant Module 2, 2015.
 - Reviewer for Isreal Science Foundation Individual Research Grants. 2016 (Mar).
 - Reviewer for Canada Natural Science and Engineering Council Discovery Grant. 2017.
 - Research Council of Hong Kong. 2017.
 
Singapore University of Technology and Design:
- Member of the Graduate Committee, ISTD, Aug. 2016 – Jul 2017
 - Member of the Admissions Committee of the MIT-SUTD Dual Masters Programme, 2015.
 - Mentor for Junior College attachment, SUTD, Sep 2014 – Feb 2015.
 - Chair of the departmental undergraduate committee, ISTD/SUTD, Sep. 2012 – Aug. 2014.
 - Member of the departmental undergraduate committee, ISTD/SUTD, Jul 2017 -
 - Member of the university curriculum committee, SUTD, Jan. 2013 – Aug. 2014.
 - Mentor for the Immersion Program, SUTD, 2014.
 - Mentor (merit award) for the Science Mentorship Program, Singapore, 2013.