BuildSys 2024 and SenSys 2024 will be co-located at Dragon Hotel, Hangzhou, China. Please refer to SenSys 2024 Visa, Venue & Travel for more information.

Visa Requirements

We recommend all participants to check their visa requirements to visit China before planning their travel as soon as possible. While some applicants may be exempt from visa for their touristic or business visit to China, the others can easily obtain a visa. For details of Chinese visa categories and their document requirements, please refer to: About Chinese Visa

China Online Visa Application (COVA)

COVA MFA

In case a visa letter signed by local organizer is needed, please reach out to [email protected] with the following information: Name, Gender, Date of Birth, Passport Country, Passport #, Passport Expiration, Tentative Arrival and Departure Dates and Address. If you are an author of a paper, please also let us know the paper title.

Visa Invitation Letters

Buildsys Organizers are able to provide visa inviration letters to attendees who register for Buildsys and relavent events.

Visa Invitation Letter Request Link

Visa Support Letters

ACM Visa Support Letter Requests Link

ACM is able to provide visa support letters to attendees as well as authors with accepted papers, posters, or members of the conference committee.

If you are a recipient of ACM, SIG, or Conference funded travel grant, please include this information in your request.

For visa support letters, refer all requests to [email protected]. Please allow up to 10 business days to receive a letter. All requests are handled in the order they are received. The information below should be included with the request:

  • Your name as it appears on your passport
  • Your current postal mailing address
  • The name of the conference you are registering for. Only accepted authors may request a visa support letter prior to registering for the conference.
  • Your registration confirmation number
  • If you have any papers accepted for the conference, please provide the title and indicate whether you are the “sole author” or a “co-author”
  • Authors may indicate their paper title. If no paper, speakers can provide the title of their presentation

ACM does not provide letters for transport of vendor or presenter equipment. ACM suggests shipping the materials insured to the conference facility.