Your eldest brother and I are brothers, because Sun Wukong and the Bull Demon King have known each other for a long time and are sworn brothers. In the episode "Red Boy", when Sun Wukong went to the Bull Demon King to help rescue Tang Seng, he specifically told the Bull Demon King's men that they were... Brother, so I think the brothers of Sun Wukong and Bull Demon King said that your eldest brother and I are brothers.