墨缘书苑 app for iPhone and iPad 4.6 ( 2336 ratings ) Education Book Developer: luo guo Free Current version: 0.0.1, last update: 8 years ago First release : 14 Dec 2014 App size: 8.07 Mb 北京市海淀区中小学教育读书平台，为教师，家长，学生免费提供的阅读平台。