[1] Born from U Thar Din and Daw Kyi Khin in Mandalay, Burma.
In 1964, he worked as a formal journalist in the Ludu Newspaper (The People), Mandalay, Myanmar.
[1] In 1967, the Burmese military regime imprisoned U Sein Win and also three editors (U Tin Maung Lay, U Mya Nyunt and U Tin Shein) from Ludu Newspaper (The People), banned in July 1967.
When he was in Insein prison, his right side of body was failed to mobile because of suffering a stroke.
[1][5] The Ludu Library in Mandalay houses a complete collection of Sein Win's works.