Lord and Vassals Reunite at Gucheng 會古城主臣聚義

In Chapter 28, Guan Yu heard from Liu Pi and Gong Du in Runan that Liu Bei had gone back to Yuan Shao; leaving Zhang Fei to hold Gucheng, he went with Sun Qian to the border of Hebei and stayed at Guan Ding's manor. Sun Qian, entering Yuan Shao's camp, met Liu Bei and Jian Yong, and they devised a plan for leaving Yuan Shao on the pretext of persuading Liu Biao to join in attacking Cao Cao. Yuan Shao said he would kill Guan Yu to avenge Yan Liang and Wen Chou, but at Liu Bei's words that this would be losing two deer to gain a tiger, he laughed and said it had been a joke, and sent Jian Yong along with Liu Bei to keep watch on him. Romance, Ch. 28 §41–51

At Guan Ding's manor Liu Bei and Guan Yu met, clasping hands and weeping, and Liu Bei had Guan Ding's second son, Guan Ping, become the son of the sonless Guan Yu. On the way to Mount Woniu, Zhou Cang reported that he had been speared in three places by an unknown general, and when that general saw Liu Bei he dismounted and prostrated himself. It was Zhao Yun, who had been wandering since the fall of Gongsun Zan; he had killed Pei Yuanshao and taken over his mountain stronghold. Romance, Ch. 28 §52–58

Liu Bei's party burned the stronghold and entered Gucheng, where they met Zhang Fei, Mi Zhu and Mi Fang, and Liu Bei, hearing of Guan Yu's deeds from the two ladies, was filled with admiration. They slaughtered oxen and horses to give thanks to heaven and earth, and, rejoicing that the brothers were together again and that they had gained Zhao Yun, Guan Ping and Zhou Cang besides, they feasted for several days in a row. The band, now four or five thousand strong, went to Runan at the invitation of Liu Pi and Gong Du and garrisoned it, while Yuan Shao, when Liu Bei did not return, sought to ally himself with Sun Ce. Romance, Ch. 28 §59–62