What is the main idea and idiom of the story of Handan toddler (the simpler the better)?

"Handan toddler": also known as "Handan toddler". Metaphor blindly imitate others, not only can't learn skills, but also lose the original skills.

The story of A Trip to Handan tells that during the Warring States Period, a Yan man, Zhao from Handan, heard that his walking posture was beautiful and came to Handan to learn to walk. Walking posture, who didn't get it, forgot his own, and finally climbed back to Yan State. In Li Bai's poem, he said: Keeping the mausoleum out of step makes people laugh at Handan.

Imitate others and lose your personality.

[Pinyin] hán dān xué bù?

[Interpretation] Handan: the capital of Zhao in the Warring States Period; Toddler: Learn to walk. It is a metaphor for imitating people who don't go home and forgetting what they once knew. ?

[Source] "Zhuangzi Qiushui": "And I have never heard of Fu Shouling's study in Handan? If you can't get the power of the country, you will lose your reason and go straight to your ears. " ?

Learning from foreign experience, Handan can't learn to walk, even losing its own successful experience.