Gwoyeu Romatzyh
In the 1950s, the Language Reform Committee of the People's Republic of China devised the Hanyu Pinyin orthography and promulgated it as the official romanization system of mainland China. Since pinyin became the international standard for Chinese romanization in 1982, other romanizations (including the Wade-Giles system, Gwoyeu Romatzyh developed by Yuen Ren Chao, and Latinxua Sin Wenz) have become rarely used.