The Battle of Tysami was a military engagement involving a warship from the British China Squadron and the Chinese pirates of Chui A-poo.

[citation needed] At the time of the battles, Chui commanded 27 war-junks, each mounting twelve to eighteen guns and displacing an average of 500 tons.

[2] Commander John Charles Dalrymple Hay led the Royal Navy vessels which encountered Chui A-poo's fleet.

The steamer Canton also participated, her number of crew and armament is not known but she was chartered and armed by a Lieutenant Bridges from the Peninsular and Oriental Steam Navigation Company.

[3] While off the burning Tysami, at 11:00 pm the Chui A-poo and his men were spotted in fourteen large junks heading southwest in two lines of seven vessels.

[4] Heading right for the junks, Canton opened up with her guns and by the time she was receiving enemy fire, Hay's ship came within range and engaged.

After a few more minutes of accurate fire, Chui A-poo's fleet scattered and three junks were abandoned by their crews, most of whom drowned as their vessels were sunk around them.

Commander Hay ordered that on 1 October, the remaining junks be attacked, so he sent a letter to Rear Admiral Sir Francis Augustus Collier requesting reinforcements while he prepared for further fighting.