Hi @Xueqing Liu ,
I understand how frustrating this must have been for you.
We value our customers' time, and this should not have happened.
I appreciate you making us aware of your negative experience.
We prioritize the issue you're facing with us, and our team is already working actively to resolve the issue. I'll notify you right away when it's fixed.
Please don't hesitate to contact us if you need further assistance.