[For academic questions such as data content andresearch cooperation, please contact us]
Shan Yuli<shanyuli@outlook.com>, GuanDabo<guandabo@hotmail.com>, Liu Zhu<zhuliu@tsinghua.edu.cn>
[For technical questions such as website failuresand login failures, please contact us]
Website technology<support@zzkj.net.cn> wechatQQ: 80865727