Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
It troubles a lot to manage many IC cards when we have many. We make a hole on the card to make it convient to take as a bunch of keys. It is an easy way to take several cards without harming its function.
Since the chip and coil are just around the card, it will not influnce the function of the card with a hole
Zijingang Campus of Zhejiang University