https://www.cpr.cuhk.edu.hk/en/press/cuhk-and-the-nippon-foundation-japan-jointly-launch-a-sign-language-learning-game-signtown/?fbclid=IwAR0vF5B8DNfnvuQfp5v1n5jssSELuXTGSXeqMIcEVRzapuAPp-1zad846rw