Student homework, form has reference. Using magnetic charging technology, scanning the QR code for payment, three colors of lights represent three working states.
The copyright of this work belongs to 呆妞屁歪吸. No use is allowed without explicit permission from owner.
New user?Create an account
Log In Reset your password.
Account existed？Log In
Read and agree to the User Agreement Terms of Use.
Please enter your email to reset your password
Two-dimensional code can be randomly generated by cdr. you are so easy to be often friends