The mobile phone client of digital teaching material service platform for primary and secondary schools in Henan Province is a mathematics teaching material software specially created by Henan Education Electronic Audio-visual Publishing House Co., Ltd. for primary and secondary school students in Henan Province. Digital textbooks for primary and secondary schools in Henan Province cover all the contents of primary and secondary school textbooks. Students can use this software to learn and download various documents online anytime and anywhere. Digital textbooks are based on national curriculum standards.