功到自然成 Success comes naturally with enough effort
Explanation
只要付出足够的努力，最终就能获得成功。强调的是努力的重要性以及成功必然的结果。
If you put in enough effort, you will eventually achieve success. It emphasizes the importance of hard work and the inevitability of success.
Origin Story
话说唐朝时期，有个叫张铁匠的铁匠，他技艺精湛，但为人谦逊，从不骄傲自满。他有一个心愿，就是打造一把能够削铁如泥的神剑。为了实现这个目标，他日夜苦练，尝试各种方法，改进锻造技术。他翻阅了大量的古籍，学习前辈的经验，不断改进自己的技法。他起早贪黑，废寝忘食，手磨出了厚厚的老茧，胳膊也酸痛不已。但他从不抱怨，因为他知道，只要功夫下得深，就能实现自己的愿望。经过多年的努力，他终于打造出了一把锋利无比的神剑，剑身光滑如镜，寒光逼人，削铁如泥，名扬天下。张铁匠的故事便是"功到自然成"最好的诠释，告诉我们只要坚持不懈，努力奋斗，成功必然会到来。
In the Tang Dynasty, there was a blacksmith named Zhang who was known for his exceptional skills but remained humble and never arrogant. He harbored a dream of forging a divine sword capable of slicing through iron like butter. To achieve this goal, he practiced day and night, experimenting with various methods and improving his forging techniques. He delved into numerous ancient texts, learning from the experiences of his predecessors and continuously refining his methods. He worked tirelessly, neglecting his sleep and meals, his hands calloused and his arms aching. Yet, he never complained, for he knew that with sufficient diligence, he would realize his ambition. After years of relentless effort, he finally forged an incredibly sharp divine sword, its blade as smooth as a mirror, its cold light piercing, able to cut through iron with ease. His fame spread throughout the land. Zhang the blacksmith's story serves as the perfect illustration of "功到自然成", showing us that unwavering perseverance and hard work inevitably lead to success.
Usage
常用于鼓励他人坚持努力，或形容事情经过努力后水到渠成。
Often used to encourage others to persevere, or to describe how something naturally comes about after effort.
Examples
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只要功夫深，铁杵磨成针，功到自然成。
zhǐyào gōngfū shēn, tiěchǔ mó chéng zhēn, gōng dào zì rán chéng.
Practice makes perfect; diligence leads to success.
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他刻苦练习书法，日积月累，功到自然成，终于练就了一手好字。
tā kèkǔ liànxí shūfǎ, rìjīlěi, gōng dào zì rán chéng, zhōngyú liànjiù le yī shǒu hǎo zì.
He practiced calligraphy diligently, day in and day out. In time, his hard work bore fruit, and he developed an excellent hand in calligraphy.