Li Sijian (Chinese: 李思諫) (died 908), probably né Tuoba Sijian (拓拔思諫), was an ethnically-Dangxiang warlord in the latter years of the Chinese Tang dynasty and Tang's successor state Later Liang of the Five Dynasties and Ten Kingdoms period, who controlled Dingnan Circuit (定難, headquartered in modern Yulin, Shaanxi) as its military governor (Jiedushi) in de facto independence.
His older brother Tuoba Sigong became a warlord during the reign of Emperor Xizong of Tang and, for his role in aiding the Tang dynasty imperial government against the major agrarian rebel Huang Chao's state of Qi, was given the title of military governor of Dingnan Circuit, and was also given the imperial clan surname of Li.
)[3] In 895, when Emperor Xizong's brother and successor Emperor Zhaozong fled the capital Chang'an into the Qinling Mountains to the south of Chang'an in fear of the warlords Li Maozhen the military governor of Fengxiang Circuit (鳳翔, headquartered in modern Baoji, Shaanxi) and Wang Xingyu the military governor of Jingnan Circuit (靜難, headquartered in modern Xianyang, Shaanxi), the major warlord Li Keyong the military governor of Hedong Circuit (河東, headquartered in modern Taiyuan, Shanxi) arrived in the region to aid the emperor.
[4] When the campaign was formally cancelled in 897, Li Sijian was made the military governor of Ningsai Circuit (寧塞, i.e., Baoda).
)[5] In 907, the major warlord Zhu Quanzhong the military governor of Xuanwu Circuit (宣武, headquartered in modern Kaifeng, Henan) had Emperor Zhaozong's son and successor Emperor Ai yield the throne to him, ending Tang and starting a new Later Liang.