Digunai (24 February 1122 – 15 December 1161), also known by his sinicised name Wanyan Liang and his formal title Prince of Hailing (海陵王, Hǎilíng Wáng), was the fourth emperor of the Jurchen-led Jin dynasty of China.

To legitimise himself as a sinicised ruler, in 1150 he lifted Emperor Taizong's prohibition of wearing Han Chinese dress, and adopted an array of Han Chinese practices and institutions, such as holding of sacrificial ceremonies in the northern and southern suburbs of his capital in 1149 (cf.

ceremonies conducted at the Temple of Earth and Temple of Heaven in Beijing during the Ming and Qing dynasties), the use of the imperial carriage in 1151, a system of feudal rights in 1156, and the Song dynasty's shan-hu (山呼) style of court ceremonies in 1157.

[5] In his pursuit for greater sinicisation and the desire to acquire the Mandate of Heaven, Digunai moved his imperial court from Shangjing (present-day Acheng District, Harbin, Heilongjiang Province to Yanjing (present-day Beijing) in 1153.

[5] In contrast to the traditions of the Tang and Song dynasties, which rarely imposed corporal punishment on the members of the society's educated elites, Digunai continued the Khitan and Jurchen tradition of floggings with gusto, sometimes enjoying personally watching his subjects – including chancellors, censors, and a princess – beaten with poles or whips.