中国は漢字の数が5万字にものぼり、リテラシーの改善が大きな課題でした。
蔡は、文盲をなくす目的で、表音式のスピード文字を創案しました。

The numbers of Chinese Character are increasing year by year, and over 50,000 characters are printed in the dictionary.
Improvement of literacy was a big problem for the Government in 19 century.
Cai Xi Yong invented a n original phonetic letter to improve literacy in China.
The titled "Fuyin Kuai Zi" was published in 1896.

それは、漢語と同じように、縦書きで、右から左へ書かれました。書名は、表音スピード文字でした。

It was written from Up to Down and the line begins Right to Left in the same way as Chinese writing.