xiǎo hái zi kāi shǐ yǒu fǎn kàng yì shí hěn zhèng cháng shuō míng tā zài jiàn lì zì wǒ biān jiè

小孩子开始有反抗意识很正常，说明他在建立自我边界。

It's normal for a child to start developing a sense of rebellion; it shows he is establishing his own boundaries.