Pronunciation rì yuè tóng guāng ā ng
Interpretation shines with the sun and the moon. Describe a person's spiritual character or great contribution.
The source "Huai Nan Zi Bo Zhen Xun": "Those who can swim in the shadows are as bright as the sun and the moon. Therefore, taking Tao as the pole, virtue as the fiber, ritual and music as the hook, benevolence and righteousness as the bait, throwing it into the river and floating on the sea, everything is not your own. "
Synonym sun and moon shine together. See "Tonghui" and "Tonghui Society".