Liu Jun 劉晙

In Chapter 65 of the Romance, Ma Chao at Jiameng Pass accepts Li Hui's persuasion, cuts down Yang Bai with a single stroke of his sword, and taking the head, goes up to the pass with Li Hui and surrenders to Xuande. Xuande welcomes him in person and treats him with the courtesy due to an honoured guest, then has Huo Jun and Meng Da guard the pass and withdraws his troops to go and take Chengdu. Zhao Yun and Huang Zhong welcome them into Mianzhu, and a report comes in that the Shu commanders Liu Jun and Ma Han have arrived leading troops. Romance, Ch. 65 §35–36

Zhao Yun says he will go and capture these two men himself, mounts his horse and leads his troops out. Xuande is entertaining Ma Chao with wine on the city wall, and before they have even settled into their seats, Zhao Yun has already cut off the two men's heads and presents them before the banquet. Ma Chao too is startled and doubles his respect and esteem, saying that there is no need for his lord's army to fight, since he himself will call Liu Zhang out and make him surrender. Romance, Ch. 65 §36–37

When the defeated soldiers return to Yi Province and report, Liu Zhang is greatly alarmed, shuts the gates and does not come out. When Ma Chao and Ma Dai come below the city wall and call on him to hand over his land and surrender, Liu Zhang faints on the wall, and on coming to, says that he would rather open the city gates and surrender to save the people of the whole city. In the Romance, the only place Liu Jun's name appears is this single report that he had arrived leading troops together with Ma Han. Romance, Ch. 65 §36 · 38–39