| Date | Name |
| 21/08/2015 | Mr. Paul Ivor Davies |
| 27/07/2016 | Mrs. Lee Eun Seon |
| 26/12/2016 | Mr. Seokmoo Lee |
| 10/01/2017 | Ms. Nancy Grezet Leoni |
| 20/03/2017 | Mrs. Sonja Wielander |
| 06/04/2017 | Mr. Mark Cooper |
| 19/12/2017 | Ms. Angel M.K. Choy |
| 21/12/2017 | Mr. Meschiui Emilio |
| 26/02/2018 | Mr. Fabrizio Audisio |
| 16/08/2018 | Mr. Chen Bo |
| 09/09/2018 | Mr.Frederic Cornet |
| 03/03/2019 | Mr.K.P.S. Sekhom |
| 30/10/2019 | Mr Yasutoshi Yamanaka |
