Zhu Youzhen, emperor of Later Liang (died 923)

Year 888 (DCCCLXXXVIII) was a leap year starting on Monday of the Julian calendar.

Zhu Zhen, often referred to in traditional histories as Emperor Mo of Later Liang and sometimes by his princely title Prince of Jun (均王), né Zhu Youzhen (朱友貞), known as Zhu Huang (朱鍠) from 913 to 915, was the third and last emperor of China's Later Liang dynasty during the Five Dynasties and Ten Kingdoms period, ruling from 913 to 923. He ordered his general Huangfu Lin (皇甫麟) to kill him in 923 when Emperor Zhuangzong of Later Tang, the emperor of Later Liang's enemy Later Tang to the north, was on the cusp of capturing the Later Liang capital Daliang. His death marked the end of Later Liang, which was to be the longest among the Five Dynasties. Despite his ten-year reign being the longest of all the Five Dynasties emperors sources on his era are relatively scarce, as many Later Liang records were destroyed following the Later Tang conquest of the Later Liang.

Liang, known in historiography as the Later Liang or the Zhu Liang, was an imperial dynasty of China and the first of the Five Dynasties during the Five Dynasties and Ten Kingdoms period. It was founded by Zhu Wen, after he forced the last emperor of the Tang dynasty to abdicate in his favour. The Later Liang would last until 923 when it was destroyed by the Later Tang dynasty.