
Hello DaiXiaoxiao.
Welcome to Microsoft Community.
Regarding to your information I assume that you can't use WorkSpace.
Did you live in China?
Recently, the internet in mainland China seems to be not very stable, which has caused certain Microsoft services to be inaccessible.
If there is anything not clear, please do not hesitate to let me know.
Best Regards,
Tommy-MSFT | Microsoft Community Support Specialist