What country uses Ren?

I'm curious about the adoption of Ren, a digital currency that has garnered attention in recent times. Could you please enlighten me on which country or countries have embraced Ren as a means of transaction or investment? I'm particularly interested in understanding the regulatory stance towards Ren in those regions, as well as any notable use cases or partnerships that have emerged. Your insights would be invaluable in helping me grasp the global landscape of Ren's adoption.