Prince of Hongnong
In 907, Zhu Quanzhong forced Emperor Ai to yield the throne to him, ending Tang and starting a new Later Liang with him as its Emperor Taizu. Li Keyong, who then carried the Tang-bestowed title of Prince of Jin, refused to recognize the Later Liang emperor and continued to use the Tang era name of "Tianyou", but became effectively the sovereign of his own state of Jin. (Li Maozhen, carrying the title of Prince of Qi, and Yang Wo, carrying the title of Prince of Hongnong (later known as Wu), were two other major regional warlords who also continued to use the Tang era name of Tianyou; another warlord, Wang Jian the Prince of Shu, soon claimed imperial title himself, establishing Former Shu.) Zhang Chengye, still using Tang-bestowed titles as well, continued to serve Li Keyong.