The chief, the Sawbwa Hkun Yon, held charge through the reigns of four Burmese kings, and submitted early in 1887 on the first arrival of British troops.
Finally in 1891 the state broke out into open rebellion, the sawbwa was deposed, and a force of 1800 troops under General Sir George Wolseley occupied the town of Wuntho and reduced the state to order.
Under Burmese rule Lashio was also the centre of authority for the northern Shan States, but the Burmese post in the valley was close to the Nam Yao, in an old Chinese fortified camp. The Lashio valley was formerly very populous; but a rebellion, started by the sawbwa of Hsenwi, about ten years before the British occupation, ruined it, and it is only slowly approaching the prosperity it formerly enjoyed; pop. (1901) 2565.
The sawbwa now works as contractor for government, which takes one-third of the net profits.