History backs China in sea disputes
China has been criticized by some countries for making "ambiguous" claims on the islands, islets, reefs and waters in the South China Sea. For example, it has been criticized for "failing to honor" the United Nations Convention on the Law of the Sea despite being a signatory to it, as well as for "violating" other international laws on the sea.
A few international observers also accuse China of deliberately obscuring its territorial claims in the South China Sea by using terms not found in the UNCLOS, such as "adjacent waters" and "relevant waters". And some countries keep demanding that China "clarify" its nine-dash line map.
The fact is that, if these countries do not change their mindset and attitude, the nine-dash line will continue to be vague for them irrespective of how clearly China defines it.