2 sentences for 老爷子 (lǎo​yé​zi)

1. 这位老爷子看起来很有精神。

   zhè wèi lǎo​yé​zi kàn​qǐ​lai hěn yǒu jīng​shen.

   This old gentleman looks very energetic.

   Source: Dong Chinese Dictionary

2. 我家老爷子退休以后就爱种花。

   wǒ jiā lǎo​yé​zi tuì​xiū yǐ​hòu jiù ài zhòng huā.

   My old man has loved growing flowers since he retired.

   Source: Dong Chinese Dictionary