Pei Xuanjing originally referred to Qingyang Zi as a senior, inheriting this title from his martial academy days. Even when Pei Xuanjing's strength had vastly surpassed Qingyang Zi, he did not change how he referred to him.
However, Qingyang Zi insisted on being called otherwise. Given Pei Xuanjing's current strength, hardly anyone could be legitimately referred to as his senior. Especially as Qingyang Zi and Xuanjing's fellow apprentice, Qingxu Taoist, were peers, he could not possibly address Qingyang Zi as his senior, so this appellation naturally ceased.
Qingyang Zi shook his head repeatedly, saying: "This is merely part of my duties, no hardship involved. Besides, the position of instructor in the Taoist Academy is one which many people yearn for. If anything, I'm the one benefiting."