A Training App made for normal or even low vision people to pratice the basics of Cantonese braille

Method of training:
-Listen a part of Cantonese phonics, then type out that braille symbol.

Features:
-Color keys are adopted to low vision people
-Buttons number and color modes are helpful for people to understand the structure of Braille.

The objectives:
-Helping low vision people to practice the Cantonese Braille, and let normal people to understand the form of it.