The gravitational charge should be the energy instead of the mass. This modification will lead to some different results, and the experiments to test the new idea are also presented. In particular, we figure out how to achieve the negative energy and repulsive gravitational force in the lab.

中文翻译：

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质量还是能量：依靠重力

重力电荷应该是能量而不是质量。这种修改将导致一些不同的结果，并且还提供了测试新想法的实验。特别是，我们找出了如何在实验室中实现负能量和排斥重力的方法。