Bayin Htwe is the eldest son of Thado Minsaw of Prome, who had proclaimed the independence of his minor kingdom from Ava in 1482.
Htwe had ascended to the throne in 1526 after his father's death.
The new king had soon incurred the wrath of Sawlon, the leader of the Confederation of Shan States, because he did not send help in the Confederation's war against Ava in 1526–1527.
His father had been an ally of Sawlon, and had sent troops in their 1524–1525 assault on Ava.
In 1532, Sawlon and his Confederation armies (twelve thousand troops, eight hundred horses and thirty elephants) laid siege to Prome (Pyay).
Bayin Htwe had surrendered in late 1532, and had been sent to Dabayin in Upper Burma in exile.
Htwe's son Narapati was appointed vassal king.
Htwe's life in captivity is cut short after Sawlon is assassinated by his own ministers near Myedu, enabling his return to Prome.
He arrives back at the outskirts of Prome, five months after he lost his throne, but his son does not allow him back in the city.
He dies about a month later in the adjoining forests.
His legacy will live on through his offspring.
Two of his sons, Narapati and Minkhaung, become rulers of Prome, albeit as vassals of Ava.
Two of his daughters, Salin Mibaya and Laygyun Mibaya, will be married to Thado Dhamma Yaza II of Prome and Minkhaung II of Toungoo, who respectively will become viceroys of Prome and Toungoo.
He is the maternal grandfather of Queen Hsinbyushin Medaw of Lan Na and Queen Min Taya Medaw, a principal queen of King Nanda of the Toungoo Dynasty.
