大器晚成 achieve great things late in life
Explanation
指能担负重任的人要经过长时间的锻炼，所以成就较晚。
Means that a person who can take on heavy responsibilities needs to go through long-term training, so his achievements are late.
Origin Story
在古代，有一位名叫王羲之的书法家，他从小就喜爱书法，但一直没有得到名师的指点，所以他的书法水平并不高。后来，他遇到了名师卫夫人，在卫夫人的悉心教导下，王羲之的书法进步神速，最终成为了一代书法大师。王羲之的书法之所以能够如此出色，正是因为他经过了长时间的刻苦练习，才最终大器晚成。
In ancient times, there was a calligrapher named Wang Xizhi, who loved calligraphy from a young age, but never received guidance from a famous master. Therefore, his calligraphy skills were not very good. Later, he met the famous master Wei Fu-ren, and under Wei's careful instruction, Wang Xizhi's calligraphy improved rapidly, and he eventually became a great calligrapher. The reason why Wang Xizhi's calligraphy was so outstanding was that he had practiced diligently for a long time, and eventually achieved his full potential.
Usage
大器晚成是一个褒义词，常用来形容一个人经过长时间的积累，最终取得成功。
The idiom ‘大器晚成’ is a compliment that is often used to describe someone who eventually succeeds through long effort and dedication.
Examples
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虽然他年轻，但是很有潜力，日后定会大器晚成。
suī rán tā nián qīng, dàn shì hěn yǒu qián lì, rì hòu dìng huì dà qì wǎn chéng.
Although he is young, he has great potential and will surely achieve great things in the future.
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他从小就表现出非凡的才华，如今大器晚成，终于取得了成功。
tā cóng xiǎo jiù biǎo xiàn chū fēi fán de cái huá, jīn rú dà qì wǎn chéng, zhōng yú qǔ dé le chéng gōng.
He has shown extraordinary talent since childhood, and now he has achieved great success.
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大器晚成，不要灰心，相信自己一定可以取得成就。
dà qì wǎn chéng, bù yào huī xīn, xiāngxìn zì jǐ yī dìng kě yǐ qǔ dé chéng jiù.
Don't be discouraged, you have the potential to achieve great things.