Wang Bi
They did not see the Northern Yuan horde when they came within 40 "li" (about 20 km) of Buir Lake, disheartening Lan, but his vanguard commander, General Wang Bi (王弼; Marquis of Dingyuan), reminded him that it would be foolish to return with such a large army without accomplishing something. They eventually found out that the Northern Yuan horde was northeast of Buir Lake, and they approached under cover of darkness and a sandstorm. On 18 May 1388, near Buir Lake, the Ming army launched an attack against the Northern Yuan forces, who were caught off guard. The battle concluded with the Ming capturing many of the Northern Yuan soldiers, but Tögüs Temür escaped.