Shanghai professional tutor website. Su Jiaoban refers to a series of textbooks for primary and secondary schools published by Jiangsu Education Publishing House, referred to as Su Jiaoban. This version of the fourth-grade Chinese Nantong homework can be bought on the Shanghai professional tutor website, which can provide all-round family education services such as Chinese, mathematics, English, physics, chemistry and Olympics, violin, piano, calligraphy and computer.