Hà ny ǔ p ψ ny ψ n (hà ny ǔ p ξ ny ξ n) is the official Chinese Pinyin scheme in People's Republic of China (PRC), which was studied and formulated by the Chinese Pinyin Scheme Committee of the former China Language Reform Committee (now the State Language Commission) during the language reform from 65438 to 65438 to 0957. This pinyin scheme is mainly used to mark the pronunciation of Putonghua and Chinese as the phonetic symbol of Chinese characters. The National People's Congress1958 February 1 1 approved the announcement of the plan. 1982, which became the international standard ISO7098 (Chinese Roman alphabet spelling). Some overseas Chinese areas, such as Singapore, use Chinese Pinyin in Chinese teaching.