Why save Yan Ruyan's father? That was practically a rhetorical question—Yan Ruyan's old man was his future father-in-law.
Since he could save him, Yan Taibai certainly wouldn't stand by and watch him die. Moreover, Yan Ruyan's father had treated him exceptionally well, occasionally having Yan Ruyan or Aunt Xue bring him medicinal pills and Spirit Stones to aid in his cultivation.
He could be considered one of the very few people in the Yan Family who genuinely treated him with kindness and cherished him like a younger member of the family. Even though this was largely because of his fiancée, Yan Ruyan, he had still been treated quite well by him in the end.
Chapter 20