Yang Qing went through everything about her founder, at least where it tied to her personal matters. The part about the founder's childhood, and how his twin sister once almost tried to murder him, he most definitely made sure to include. He felt it might shed some light on the founder's personality and what mattered to him, while also offering a little insight into how he might have reacted to what the Xia clan had done concerning the retainer clans.
Yang Qing believed that part of the reason Xia Huang and other Xia clansmen who were disciples of the Silver Crane Sect were able to follow through so easily on not interfering with clan affairs, even when they were on the brink of annihilation, had much to do with their understanding of the founder's personality. That was something they would have become aware of once they joined the Silver Crane Sect.