ALSO - Many if not most web conferencing technologies will experience issues with users in China.
Please see this news item for further details.
Please also look over this policy about collaboration technologies and recordings as they relate to students in particular. If the technology you want to use is not listed in this policy, do not use it for instructional purposes.
Google Meet is available to faculty, staff, and students through the UW-Madison Google Workspace for Education. You must activate a UW Google+ account to use Meet. For details about Meet, click UW-Madison Google Workspace - Getting Started with Google Meet
Cisco Webex (Meetings / Webinars) is available to faculty, staff, and students. This software can be installed on all UW-Madison computers and is accessible for download either via the Campus Software Library or via the UW-Madison Webex portal. For more information regarding Webex, click here.
Microsoft Teams offers chat, calls, and meetings and is available to faculty, staff, and students through the University's Microsoft 365 license. For more information, click Microsoft 365 - Getting Started with Teams.
Zoom is now available at UW-Madison, starting with the Fall 2020 semester. For more information, see UW-Madison Zoom - Getting started.
Non-UW-Madison tools: Due to FERPA, HIPAA, and other data privacy considerations, campus policy prohibits the use of other, non-sanctioned web conferencing software such as Skype for any University academic or business purposes.