cdn.tgp.qq.com isn't the kind of site you visit in a browser. It's a content delivery endpoint controlled by Tencent, one of the world's largest internet companies. That immediately answers the question of who runs it and why it exists. For a backend subdomain, the absence of an about page, contact info, or legal pages is irrelevant. Those don't belong here.
The security setup is good overall: a valid certificate from DigiCert and modern TLS support. The one catch is the server still speaks TLS 1.0 and 1.1, which are outdated. That matters for a CDN because weak encryption could affect data in transit, but it's not a red flag calling the site's legitimacy into question.
Clean blacklist records and no Google Safe Browsing warnings back up the picture. If you're asking 'is cdn.tgp.qq.com a scam?' the answer is no. It's an infrastructure component doing what it's designed to do. There's nothing here to worry about for anyone who isn't trying to browse the endpoint directly. For a legitimate company running a massive platform, this level of transparency around the parent company and hosting network is exactly what you'd expect.