近日，地处台湾省的台南市上空惊现神秘飞碟状云层。云层中隐隐可见一个完整的圆圈向外散发着光芒，是大自然的鬼斧神工还是神秘的UFO来访地球？抑或是2012世界末日的预兆？请关注本期神秘视频揭秘！
Hints:
Tainan City
We are observing a phenomenon over Tainan City. It's like a perfect circle over Tainan City, a perfect circle in the sky. I would like to know what it takes what's a naturally occurring phenomenon that can create a perfect circle in the middle of the clouds. A perfectly circle glaring in the clouds over Tainan City, I don't know what it could be.