Tianyu official website is running normally at present, so you can log in directly. You can try again. The address is www.k-touch.cn. You can check whether the wrong address you entered prevents you from logging in.
I hope the above reply is helpful to you, and thank you for your support of Tianyu products ~
Being late is not allowed in the school, but there are always children who are late, so the school uses various methods to stop bein