The international System of Units (SI) was redefined in 2018 [1]. This historical event implemented a beautiful idea—a system of units defined entirely by constants of nature. The most notable modification to the SI involved abandoning the artifact definition of the kilogram in favor of fixing the numerical value of the Planck constant. Apart from its physical and mathematical elegance, the new SI solves the problem of providing an absolute reference for the kilogram. But, how do we understand the link between the kilogram and the Planck constant? And, how can we realize the kilogram now, using the new definition? This paper attempts to give a simple answer to these complicated questions.

中文翻译：

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从普朗克常数实现千克：粗磨天平和电气单位

国际单位制（SI）在2018年重新定义[1]。这次历史事件实现了一个美丽的主意-一个完全由自然常数定义的单位系统。对SI的最显着修改涉及放弃千克的伪影定义，而倾向于固定普朗克常数的数值。除了其物理和数学上的优雅之外，新的SI还解决了为公斤提供绝对参考的问题。但是，我们如何理解公斤与普朗克常数之间的联系？而且，我们现在如何使用新的定义来认识公斤呢？本文试图对这些复杂的问题给出一个简单的答案。