If you're researching saas.fscut.com.w.kunlunsl.com, the evidence points to a site that simply isn't ready for visitors. The domain is a multi-level subdomain that resolves to Chinese hosting but refuses to serve any content — everyone gets a 403 Forbidden error. There's no HTTPS, no company information, and no public record of this site ever existing before today.
For a legitimate SaaS platform, these are basic requirements that are missing here. Most real software services show at least an about page, a login screen, or a marketing splash page. This one shows nothing. While the site hasn't been blacklisted, the complete lack of transparency and the broken technical setup make it hard to recommend any interaction. If someone directed you here expecting a working product, it's likely the service never launched or was taken down. Until the site actually works and identifies itself, treat it as a dead end.