She would be able to smoothly take over the Yanqi Sect in the future, without any accidents occurring.
But...
The only flaw was that she was too proud and too serious, unwilling to be close to people ever since she was a child.
She didn't even have a single friend, and even in front of him, her father, she was strictly businesslike, which made him quite helpless.
That was also why, when he noticed that his daughter seemed to have a bit of infatuation for the Demon Lord, he couldn't wait to arrange a political marriage between his daughter and the Demon Lord.
On one hand, it was indeed for the good of the Yanqi Sect; once the marriage was successful, the sect's strength would increase by a large margin, and on the other hand, he wanted to change Guan Qinghan's temperament, to allow his daughter to experience a bit of warmth in this cold cultivation world.