Ma Wan 馬玩

In Chapter 58 of the Romance, just as Ma Chao has raised the troops of Xiliang and is about to set out, Han Sui, Administrator of Xiliang, summons Ma Chao and shows him a letter from Cao Cao promising to make Han Sui Marquis of Xiliang if he captures Ma Chao and sends him to Xudu. Han Sui says that, having sworn brotherhood with Ma Chao's father, he cannot bear to harm him and will help him; he beheads Cao Cao's envoy and musters the troops of the eight divisions under him. Those eight divisions are Hou Xuan, Cheng Yin, Li Kan, Zhang Heng (張橫), Liang Xing, Cheng Yi, Ma Wan and Yang Qiu, and the eight generals follow Han Sui and join Pang De and Ma Dai under Ma Chao to march on Chang'an with a great army of two hundred thousand. Romance, Ch. 58 §11–13

In Chapter 59, when Cao Cao, following Jia Xu's plan, sends Han Sui a letter full of corrections and erasures, Ma Chao, having seen the letter, suspects Han Sui. Han Sui says that the next day he will lure Cao Cao into a talk in front of the lines and Ma Chao should then rush out from within the lines and stab him to death, and the next day he comes out of his lines leading the five generals Hou Xuan, Li Kan, Liang Xing, Ma Wan and Yang Qiu. But Cao Hong, sent by Cao Cao, returns after saying only that Han Sui must not fail what the Chancellor asked of him last night, and when Ma Chao, hearing this, tries in anger to stab Han Sui, the five generals block him, calm him and return to camp. Romance, Ch. 59 §23–28

When Han Sui discusses with the five generals how to resolve the matter, Yang Qiu urges him to go over secretly to Cao Cao, and goes to Cao Cao's camp and back carrying a secret letter. Cao Cao agrees to make Han Sui Marquis of Xiliang and Yang Qiu Administrator of Xiliang and to give all the others rank and office as well, and they agree to start a fire as the signal for attacking Ma Chao together. Han Sui has dry firewood piled up behind the central command tent and has the five generals each wait with swords at their sides. Romance, Ch. 59 §28–30

But Ma Chao, having already found out the details, steals into Han Sui's tent and, while the five generals are talking secretly with Han Sui, hears Yang Qiu say that it must be done quickly. When Ma Chao bursts in brandishing his sword and cuts off Han Sui's left hand, the five generals rush out together brandishing their swords, and outside the tent they surround Ma Chao and fight him in a melee. Ma Chao, alone, wields his precious sword against the five generals, cuts down Ma Wan and hacks down Liang Xing, and the other three generals each flee to save their lives. The Romance records nothing more of Ma Wan after this. Romance, Ch. 59 §31–32