High Quality Content by WIKIPEDIA articles! Gwoyeu Romatzyh (literally "National Language Romanization"), abbreviated GR, is a system for writing Mandarin Chinese in the Latin alphabet. The system was conceived by Y.R. Chao (Zhao Yuanren) and developed by a group of linguists including Chao and Lin Yutang from 1925 to 1926. Chao himself later published influential works in linguistics using GR. In addition a small number of other textbooks and dictionaries in GR were published in Hong Kong and overseas from 1942 to 2000.