In the Chinese version of PS, there is no marathon.So I want to re-bind my PS account

In the Chinese version of PS, there is no marathon.So I want to re-bind my PS account，I know the existing policy doesn't allow unlinking associated accounts, but this stops me from playing Marathon on PS because I have a Chinese region account. This is a big issue, it's really terrible. I love this game so much, I hope this policy can be changed, or I want to know when Chinese players will be able to play Marathon.