Why did Yu Zhonghe adopt Yu Jiayin?

Chips versus bonds. According to the inquiry of iQiyi, Yu Zhonghe saved Pound's daughter after killing his wife in the TV series Blade 1937, and decided to raise him, thinking that Yu Jiayin would be the last chip for Yu Zhonghe to deal with Pound when Pound came back for revenge. Blade 1937 tells the story that Zheng Shusen, a punk, was forced to make a living and got to know Pound, a Jianghu tycoon who hid in prison to avoid hatred, and gradually developed into a new force of the Shanghai Gang under his arrangement.