4 sentences

1. 你这是在自欺欺人吗？

   nǐ zhèi shì zài zì​qī​qī​rén ma?

   Are you fooling yourself?

   Source: OpenSubtitles

2. 这种行为简直是自欺欺人。

   zhè zhǒng xíng​wéi jiǎn​zhí shì zì qī qī​rén.

   This behavior is simply deceiving oneself and others.

   Source: Dong Chinese Dictionary

3. 我是个自欺欺人的中年妇女。

   wǒ shì gè zì​qī​qī​rén de zhōng​nián fù​nǚ.

   I'm just a middle-aged woman who's fooling herself.

   Source: OpenSubtitles

4. 别再自欺欺人了，大家都已经看穿了你的谎言。

   bié zài zì​qī​qī​rén le, dà​jiā dōu yǐ​jīng kàn​chuān le nǐ de huǎng​yán.

   Stop fooling yourself; everyone has already seen through your lies.

   Source: Dong Chinese Dictionary