One plus education. One Plus Education, established in 2006, is one of the earliest off-campus training institutions engaged in mathematics in Anqing, and making up lessons in mathematics is a good choice. Anqing, referred to as "Yi", is a prefecture-level city under the jurisdiction of Anhui Province. It is one of the 27 cities in the central area of the Yangtze River Delta, located in the southwest of Anhui Province and on the north bank of the lower reaches of the Yangtze River.