Sign up for an Award
Participate with your entry in one of our professional or student awards.
Sign up for an awardLearn more:
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
A group of people who live in the darkness
Unseen
Only by touching
Touch convenience sign
Through different touch
There are differences and the role of classification
Provide convenience for their life
Beijing Technology and Business University
Beijing, China
Xinxin Cheng,
Beijing Technology and Business University
Yilin Liu,
Beijing Technology and Business University
