6 to 20 characters. According to the query of Shanxi Education Public Service Platform, the password format of Shanxi Education Public Service Platform is 6-20 characters, which supports English, numbers and underscores. The public service platform of Shanxi educational resources is a public service platform of online educational resources in Shanxi Province, which is organized by the Education Department of Shanxi Province and jointly built by enterprises, institutions and all walks of life in the province.