2 sentences for 自家 (zì​jiā — oneself)

1. 这种事儿，你自家心里清楚就好。

   zhè zhǒng shì​r, nǐ zì​jiā xīn​li qīng​chu jiù hǎo.

   As for this kind of thing, it's enough that you know the truth in your own heart.

   Source: Dong Chinese Dictionary

2. 有些公司专门雇人来捧自家的产品。

   yǒu xiē gōng​sī zhuān​mén gù rén lái pěng zì​jiā de chǎn​pǐn.

   Some companies specifically hire people to hype up their own products.

   Source: Dong Chinese Dictionary