I’m trying to diagnose a regional accessibility issue, not promote the site.

My website is hosted on Alibaba Cloud in mainland China and served through a CDN. I can access it normally from within China. At least one user in Malaysia reports that the site does not load, but I can still see overseas visit records in the backend.

I’m trying to narrow down the most likely cause. Would you first suspect DNS/CDN regional resolution, IPv6 issues, SSL/TLS compatibility, WAF/CDN blocking, or cross-border routing instability?

I’m not posting the domain to avoid self-promo concerns, but I can provide it in comments if needed. I’d also appreciate suggestions on the most useful tests to run first.