UFO caught over the Great Wall of China

On April 15, 2017, a witness has taken a picture of a metal disc-shaped UFO over Simatai, a section of the Great Wall of China, located in the north of Miyun County.

Witness report:

1. Went for great wall hiking.
2. Didnt notice at all untill i went back to the state & check on my cellphn picture album.
4.I think it was flying straight over the sky around the hill or great wall structure.
5. I didnt realise at first right after i took the picture. I was capturing the view site of the great wall while hiking.
6. None