Râu Cao is a user on kosmos.social. You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.
Râu Cao @raucao

If you'd like to see location tagging in Mastodon (e.g. I'd love to have it for my photo posts), plz give this issue a thumbs-up: github.com/tootsuite/mastodon/