"Grandpa, if you don't help me, then who will?"
Gu Sitian's personality was such that she would often impulsively say the wrong things without thinking. Realizing she had made her grandfather mad, she hastily softened her tone, pleading, "You can't be like this! Without your support, how could I ever beat that damned girl, Gu Qianqian..."
Every term she used when referring to Qianqian was derogatory - such as "wild girl" or "damned girl".
This clearly showed how much prejudice Gu Sitian held against Gu Qianqian. The elder Mr. Gu won't force his family to like the person he liked, but if Qianqian was to become his daughter, she would eventually be Gu Sitian's elder; they would truly become a family.
He didn't wish, and didn't want to see their relationship remaining so strained, but no outsider could do anything about it; he could only helplessly watch and fret, "I just can't understand, why are you continuously targeting that girl?"