Standard Chinese (Standard Mandarin), based on the Beijing dialect of Mandarin, was adopted in the 1930s and is now an official language of both the People's Republic of China and the Republic of China (Taiwan), one of the four official languages of Singapore, and one of the six official languages of the United Nations. The written form, using the logograms known as Chinese characters, is shared by literate speakers of mutually unintelligible dialects. Since the 1950s, simplified Chinese characters have been promoted for use by the government of the People's Republic of China, while Singapore officially adopted simplified characters in 1976. Traditional characters remain in use in Taiwan, Hong Kong, Macau, and other countries with significant overseas Chinese speaking communities such as Malaysia (which although adopted simplified characters as the "de facto" standard in the 1980s, traditional characters still remain in widespread use).