"Greetings, Senior Brother Guangchengzi," said Qin Yun with a bow. Due to the Daoist-Fiend war, the relationships between the three Daoist lineages had warmed up significantly. At the very least, they appeared united on the surface. In terms of seniority, Guangchengzi was Heavenly Lord of Primordial Beginning's disciple while Qin Yun was Heavenly Lord of Numinous Treasure's disciple. It was indeed correct for him to address Guangchengzi as senior brother. Instead, it was Yang Jian who was a third generation Jade Void Palace disciple. Strictly speaking, he was one generation Qin Yun's junior.
However, strength was supreme in the Three Realms.
If emphasis was placed on seniority and cultivation time, there were tons of ancient existences that would win out. Just the Chaos Godfiends alone were a huge bunch!