Indeed it does, funny you should ask. The Taiwan authorities not only agree with and support the nine-dash line, but they also still claim all of Mongolia as well as parts of Russia, India, Pakistan and Afghanistan. The Beijing government, much to Taiwan’s dismay, has long since signed treaties with all of them except for a small part of India which is still in dispute.
Of course, you wouldn’t know about that because the AP/Reuters/AFP cabal doesn’t tell you. It doesn’t sit well with the approved narrative. When it comes to global news they are the ones that cherry-pick what they think you should know.