There's a saying that goes, "An elder brother is like a father."
Chen Pingping probably fit that description.
Wen Yuqing was always busy and had no time to look after them, so their Eldest Disciple took over all the affairs on Qingfeng. He taught Guang Xiaoyu how to conduct herself and Zi Ji how to survive.
AHEM!
Mainly, it was because he had no way to teach the two young women cultivation.
However, one thing was certain: Chen Pingping's approach to Guang Xiaoyu's and Zi Ji's cultivation was different.
Guang Xiaoyu was one of the Demon cultivators; his requirement for her was: do not reveal yourself, do not reveal yourself, under no circumstances reveal yourself.
Zi Ji was the Netherworld princess; his requirement for her was: do not cultivate, do not cultivate…
