A Microsoft service that provides website owners with tools to monitor, analyze, and optimize their site's performance in Bing search results.
Hello yilong jason,
Since you’ve already checked crawler access and the indexing directives, the next step is to request a site-specific review through Bing Webmaster Support.
Please include representative affected URLs and screenshots showing both the blocked status and successful Live URL tests. We can’t inspect Bing’s internal domain status or escalate directly from this forum, so I can’t confirm the cause or promise that the block will be lifted.