by Ling Xin at scmp.com
- The sisters, whose study schedule turned them into social media stars, are teaching at major universities after completing their postdoctoral research
- Ma Donghan and Ma Dongxin each made important contributions in their respective fields while in North America
The sisters Ma Donghan and Ma Dongxin, who were born in Dalian in 1989, were top students at Tsinghua when they shot to fame after their study schedule was published online. Commenters were amazed at their daily 6am-1am routine.