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People born with Yin-yang Eyes naturally see things differently than others do.
Of course, this ability varies in strength.
Fu Xi's Yin-yang Eyes, for instance, can discern a person's fortune or misfortune in the short term, which is indeed different from ordinary people, but in the community of those with Yin-yang Eyes, it's not considered very powerful.
Moreover, if one genuinely practices the art of Feng Shui Metaphysics and enters one of the Five Major Sects, disciples with the Yin-yang Eyes usually choose to seal them. But Jiang Na's Yin-yang Eyes are truly formidable. Capable of discerning directions and determining good and bad omens, after careful consideration by her master, Taoist Ming Ye from the Shangqing Taoist Temple, she was allowed to keep one of them.
On a regular basis, she would keep one eye open and the other closed, which did not affect her adversely. On the contrary, it even provided her with an additional boost.
