@feixue
Look at there!
On the OPS, there have two small hole. their function are reset and recover.
Frist, Press and hold the reset button, until the black screen is displayed on the Windows page.
Second, press and hold the recover button, until the following picture is displayed.

After this, you can reset the basic perameters including password.
If you have any questions about the reset operation, you are advised to create a trouble ticket and contact Huawei technical support.
https://e.huawei.com/en/service-hotline-query
Best wishes!