some time ago we had a site navigation change on my website, so with the huge amount of URL's that were changed i decided to advise the Bots of the new URL destination with 301 directs.
admittedly there where a large amount of these applied across many levels of the server, this was basically for the other search engines and Baidu i didn't really think about.
i've just been going through my SERP's on baidu which used to be fairly good across the website and I'm seeing massive holes in the rankings.
what does rank are pages with the old URL structure rather than the new, does any one have any previous history with how Baidu takes a large URL restructuring of a website using 301 redirects.
the spider still visits my site but the freshness of the cache dates and the depth of indexing makes it appear as I've been penalised in their SERP's.
any one got any idea's?