dào qiàn zuì hǎo shuō qīng chǔ nǎ lǐ zuò cuò le ér bú shì zhǐ shuō xíng le wǒ cuò le

道歉最好说清楚哪里做错了，而不是只说“行了，我错了”。

It's best to apologize by clearly stating what you did wrong, rather than just saying 'Okay, I was wrong.'