The determination of territorial ownership is a complex issue based on a comprehensive consideration of many factors such as modern international law, and cannot be judged solely on the basis of the ancient territorial ownership relationship. In modern international relations, the determination of territorial sovereignty is mainly based on a series of principles and rules of international law, including the historical development of legal methods such as first occupation, limitation, attachment, cession, and conquest, as well as respect for the principle of national self-determination and the principle of non-interference in internal affairs. Although historical factors have a certain influence on the status quo of the territory, modern international law emphasizes the settlement of territorial disputes through peaceful negotiations, consultations, etc., in order to maintain the sovereign equality of States and the stability and peace of international relations. For example, some historical territorial changes may not meet the standards of modern international law at the time, but in the process of subsequent development, territorial ownership has been re-established through the recognition of the international community, new treaty agreements, etc. Therefore, the modern territorial ownership cannot be determined simply by the ancient territorial affiliation.