◆For All Speakers:
Visas are required for some nationalities to travel to Macao, China for this conference. Please contact your travel agent and/or the Macao, China Consulate/Embassy in your country for exact details and visa application procedures as soon as possible. Visa processing times can vary.

Participants are highly recommended to apply for Tourist Visa; the Organizing Committees of SDDS-2021 can not issue any official letters for your visa application due to regulations.