 I can't remember which year but it was when I was there, we don't have the surface actually yet So it's a big hole and it was quite, it was really amazing So I actually went down to the bottom and I took a picture to be at the center of the hole and it's really, it's huge I visited it about two, almost three years ago now and it was an amazing experience I mean to see a telescope that large to start with and then the thing that I remember apart from climbing up and looking from above and not being able to even get it in the camera even a portion of it, it was the sound, you wouldn't believe it, the wind blows through the mesh and makes this eerie sound that changes as the wind goes up and down, it took me a little while to wake it up I even tried to record it, it's just hair-raising but good hair-raising and well I feel actually quite proud because I'm from Guizhou and it's a world largest telescope