The State of Liang collapsed from internal problems in 641 BC,[4][5][6] and Duke Mu of Qin annexed the area completely.
The Qin Empire was a unitary state following legalist policies but, upon establishing its Han successor, Liu Bang reïnstituted the previous fiefs and granted high titles to relatives and allies.
As Liang was a rich and important patch of territory, its princes were powerful and prominent: many met with untimely deaths either because they began to covet the imperial throne or because they were feared to do so.
Liu Pengli, the prince of Jidong, became a notorious serial killer and had his lands confiscated by Emperor Jing.
A new and independent kingdom of Liang (梁王) was declared in 619 by Shen Faxing, a Sui general in the lower Yangtze.
Despite the name, his capital was at Piling (modern Changzhou) and he only ever controlled areas of present-day Zhejiang and Jiangsu before his territory was conquered by the agrarian rebel Li Zitong (under the title Emperor of Wu).
The title of prince of Liang (梁王) was revived a fourth time under the Yuan dynasty as a hereditary appanage for one of the sons of Kublai Khan.