The sun took on a "halo" in the sky over Tianjin on June 18. A halo, also known as a circular rainbow, is caused by refraction or reflection of sunlight as it passes through cirrostratus clouds.
天津上空出现罕见一幕!
6月18日,天津上空出现日晕现象,在蓝天白云的映衬下分外美丽。
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