BEIJING - A senior international relations expert Friday described the Japanese government's move to "purchase" the Diaoyu Islands and part of its affiliated islets as a reflection of the weakening of Japan's national strength.

Ji Zhiye, executive vice president of the China Institute of Contemporary International Relations, made the remarks at a symposium on the issue concerning the Diaoyu Island.

Ji said that Japan is using the "purchase" to make it appear stronger, as the country's populace has long been unsatisfied with the government's performance.

Ji said the "purchase" is intended to distract Japanese citizens from the country's poor economic situation and increase public support for boosting military spending, as well as justify its decision to move to further boost its military ally with the US.

China should respond to the Japanese move in a well-targeted manner so as to safeguard its sovereignty over the Diaoyu Island, Ji said.