I can open the OpenCV link without problem, perhaps there was a temporary server hipcup.
The second link is all wrong, it should be http://www.bryanchung.net/?page_id=251
Looks like the site is down, and you are redirected to a search site.

For such request, the Wayback Machine might help.

I tried again and couldn't access every link. I am in china mainland.

Who can help to send to a copy to me ? Or else provide with a mirror link ?

Thank yoiu very much.