Take the golden key in the cave next to killing Hua Xiong, then use the seven-star knife in the room on the upper left of Luoyang City, and then use the seven-star knife on Lu Bu all the time while playing Yangzhou, and you will join. Finally, after crossing Nanyang, he defected to Yuan Shao.
Can't really appease. Only seven people in it can be upgraded. They are Guan Xing, Zhang Bao, Zhao Yun, Ma Chao, Huang Zhong, Zhuge Liang and Jiang Wei. The rest can't be upgraded!