According to public information, Beijing Chalk Blue Sky Technology Co., Ltd. was established on 20 15. Founded by Li Yong, the former president of Netease Portal Division, he focuses on the Internet vocational education examination service. Zhang Xiaolong is currently the CEO of chalk net. He used to be a famous teacher of painting education. According to public reports, chalk APP has more than 37 million registered users and more than 5.8 million paid users.