Latinxua Sin Wenz was the not the first system for transliterating Chinese using the Latin alphabet, but it was the first to be widely used by native speakers. It was developed in the late 1920s and early 30s in the USSR, where it was employed by Chinese immigrants. It then spread to Northwestern China, where it became an important tool for promoting literacy. More than 300 publications utilized Latinxua Sin Wenz before it fell out of use. What important feature of Chinese languages did it omit? Discuss
Source: The Free Dictionary