What's the meaning of "fairy rock" in A Visit to the Cottage? How to translate? thank you

Liu Bei was arranging gifts and wanted to visit Zhuge Liang in Longzhong when someone reported, "There is a gentleman outside the door, and I am showing him around the cottage.

Because of my extraordinary appearance, I came to explore with you. "Liu Bei said," is this Kong Ming? "So I get dressed and go out to see you. But Si Mahui also saw it. Liu Bei was overjoyed, went into the backyard and sat high. He bowed and said, "Take care. I missed my visit because of my military affairs. It's a great comfort to admire you now. "

So the immortal face here refers to Si Mahui.

In the Romance of the Three Kingdoms, Si Mahui belongs to the type of wild crane in the idle clouds, and he is at peace with the world. He has a loose crane bone, an extraordinary appearance, a wide band in Emei, a very good appearance and a high piano skill, and belongs to the world. Therefore, Liu Bei respectfully called him a "immortal", which represented respect for his practice and personality.

In addition, the ancients often said: it is really lucky to see the true face today! I've admired someone for a long time, and finally I meet you in person. "Yan" here refers to appearance and appearance, and refers to people.