任重道远 Heavy responsibility, long way to go
Explanation
比喻责任重大，要经历长期的奋斗。
It means that the responsibility is great and a long struggle is required.
Origin Story
话说唐朝贞观年间，有一位名叫魏征的忠臣，他总是直言进谏，即使面对唐太宗李世民这样的帝王，也敢于指出其缺点和不足。一次，唐太宗问魏征：“你认为我治理国家的能力如何？”魏征不卑不亢地说：“陛下，您励精图治，功绩卓著，但治理国家，任重道远，还有很长的路要走，还需要不断努力。”唐太宗听后并没有生气，反而深思熟虑，更加勤勉地治理国家。他深知，魏征的话并非空穴来风，而是对国家未来发展长远考虑的体现，这正是对他的警醒和鞭策。从此以后，唐太宗更加虚心纳谏，最终成就了一番盛世伟业。
During the reign of Emperor Taizong of the Tang Dynasty, there was a loyal minister named Wei Zheng, who always spoke frankly to the emperor, even daring to point out his shortcomings and inadequacies. Once, Emperor Taizong asked Wei Zheng, "How do you rate my ability to govern the country?" Wei Zheng said without fear, "Your Majesty, you are diligent in governing, and your achievements are remarkable. However, governing a country is a great responsibility and a long journey; there is still a long way to go, and you need to keep making efforts." Emperor Taizong did not get angry but instead pondered deeply and worked even harder to govern the country. He understood that Wei Zheng’s words were not groundless but reflected the long-term consideration for the country’s future development. From then on, Emperor Taizong listened to advice more humbly and ultimately achieved great success in his reign.
Usage
多用于形容责任重大，任务艰巨，需要长期奋斗。
Often used to describe a heavy responsibility and a difficult task that requires long struggles.
Examples
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肩上的担子很重，任重道远啊！
jiānshang de dànzi hěn zhòng, rèn zhòng dào yuǎn a!
The burden on my shoulder is heavy, the road ahead is long.
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完成这个项目任重道远，需要团队的共同努力。
wánchéng zhège xiàngmù rèn zhòng dào yuǎn, xūyào tuánduì de gòngtóng nǔlì。
Completing this project is a long and arduous journey that requires the concerted efforts of the team.