Would Not Hit People in the Face

Xie Pinggang was quite happy that Yu Xian had paid attention. "Master Yu, with your ability, if you were a few years older, we would have made a lot of military merits when we fought the barbarians together. It's a pity that you're not a man. Otherwise, we would have become sworn brothers!" 

"So what if I'm a woman? From now on, you'll be my big brother!" Yu Xian also laughed heartily.

"No, you can be my brother, but I'd rather you not be my sister." Xie Pinggang was silent for a moment. "My father doesn't make much money, and our family business is small. I still have a younger brother and two sisters who have yet to settle down. Right now, only my eldest sister's dowry is left, and I'm almost out of money. If I have another sister, I won't be able to afford the dowry." 

He was not from a poor family. There were people who sold their daughters and sisters to save up for their family business.

He could not afford to lose a sister.