As Skype is banned in China, italki has a created a Skype-like product called italki classroom. It can only be used for scheduled classes and must be selected at the time that the lesson is requested. Some teachers use zoom, Google hangouts, or wechat if the student doesn't have Skype. You can contact italki support if you need more information.

https://support.italki.com/hc/en-us You can also just type in your browser 'italki' and some words from your request.