|Water Margin character|
|Rank||80th, Guardian Star (地鎮星) of the 72 Earthly Fiends|
|Infantry leader of Liangshan|
|Ancestral home / Place of origin||Jieyang Town (believed to be in present-day Jiujiang, Jiangxi)|
|First appearance||Chapter 36|
Mu Chun is a fictional character in Water Margin, one of the Four Great Classical Novels of Chinese literature. He ranks 80th of the 108 Liangshan heroes and 44th of the 72 Earthly Fiends. He is nicknamed "Little Restrained".
Mu Chun is the younger brother of "Unrestrained" Mu Hong. The brothers are from a wealthy and influential family in Jieyang Town (揭陽鎮; believed to be in present-day Jiujiang, Jiangxi), near the Xunyang River. Mu Chun excels in martial arts and wields a saber in battle.
Meeting Song Jiang
When Song Jiang is exiled to Jiangzhou (江州; east of present-day Chongzuo, Guangxi), he passes by Jieyang Town along the way and meets the street performer Xue Yong. Xue Yong's failure to acknowledge the Mu brothers' presence angers them. Mu Chun forbids the townsfolk to pay Xue Yong for his performance. Song Jiang ignores Mu Chun and gives Xue Yong five silver taels. Mu Chun is furious with Song Jiang for disregarding him and wants to beat up Song, but Xue Yong comes to Song's aid and defeats Mu in a fight.
Mu Chun feels humiliated after his defeat and is determined to take revenge on Song Jiang and Xue Yong. He forbids the townsfolk from extending their hospitality to the two men, and then secretly discusses his plans for revenge with his brother. Song Jiang overhears their conversation by chance and flees from the town. The Mu brothers capture Xue Yong, beat him up, and then lead their followers to pursue Song Jiang. In desperation, Song Jiang boards Zhang Heng's boat, without knowing that Zhang is actually a pirate who robs unsuspecting travellers. When the boat reaches the middle of the river, Zhang Heng wants to kill Song Jiang and rob him, but is stopped by Li Jun. Zhang Heng and the Mu brothers are shocked when they learn of Song Jiang's true identity from Li Jun, because they have heard of his reputation as a generous and chivalrous hero who helps those in need, and have been wanting to meet him. They apologise to him and treat him like an honoured guest before seeing him off on his journey to Jiangzhou.
Song Jiang runs into trouble in Jiangzhou later and is sentenced to death. However, the outlaws from Liangshan Marsh show up Jiangzhou, storm the execution ground, and save Song Jiang. After escaping from Jiangzhou, they head towards the riverbank, where Li Jun, the Mu brothers and others are waiting for them in boats. They ferry the outlaws back to Liangshan Marsh. The Mu brothers join the outlaw band at Liangshan.
After the Grand Assembly of the 108 Stars of Destiny, Mu Chun becomes one of the leaders of the Liangshan infantry. He follows the heroes on their campaigns against the Liao invaders and southern rebel forces after they have been granted amnesty by Emperor Huizong. During the campaign against the rebel leader Fang La, Mu Chun remains behind in Hangzhou to take care of six of his comrades who fell sick after the battle of Hangzhou. After the Liangshan forces defeat Fang La, Mu Chun is grieved to learn that his brother had died of illness in Runzhou (潤州; present-day Runzhou District, Zhenjiang, Jiangsu) during the campaign. When the surviving Liangshan heroes return to the capital to report their victory, the emperor offers Mu Chun the title of "Martial Gentleman of Grace" (武奕郎) to recognise him for his contributions during the campaigns. Mu Chun, however, declines the offer and returns home, where he leads the rest of his life as a commoner.
- (Chinese) Li, Mengxia. 108 Heroes from the Water Margin, page 161. EPB Publishers Pte Ltd, 1992. ISBN 9971-0-0252-3.
- Buck, Pearl. All Men are Brothers. Moyer Bell Ltd, 2006. ISBN 9781559213035.
- Zhang, Lin Ching. Biographies of Characters in Water Margin. Writers Publishing House, 2009. ISBN 978-7506344784.
- Keffer, David. Outlaws of the Marsh.
- Miyamotois, Yoko. Water Margin: Chinese Robin Hood and His Bandits.
- (Japanese) Ichisada, Miyazaki. Suikoden: Kyoko no naka no Shijitsu. Chuo Koronsha, 1993. ISBN 978-4122020559.
- Shibusawa, Kou. Bandit Kings of Ancient China. KOEI, 1989.