As for international organizations that are political in nature and affiliated with the United Nations, as long as mainland China is a member or has applied to join, we're locked out cold regardless of what name we go by, since the mainland is one of the five permanent members of the Security Council.
對政治性，及附屬於聯合國之下的各個國際組織而言，中共是聯合國常任理事，只要他們提出加入申請，即使我們不在乎名稱，一樣「不得其門而入」。