When I searched for a term in the "Search 8052.com" edit box at top right of the forum page, clicking on one of the hits took me to a page "https://8052.com/..."

That page was redirected by the new 8052.com site owner's site to a non-existing page on their site, which failed the attempt.

Changing the URL text to "https://8052mcu.com/..." (by adding "mcu") also failed the attempt.

Changing "https" to "http", resulting in "http://8052mcu.com/...", worked.

Example of fixed, working link:
http://www.8052mcu.com/forumchat/read/157356