February 4, 2017

"China on Friday urged the United States to stop making wrong remarks on the issue of the Diaoyu Islands sovereignty after U.S. defense secretary James Mattis reportedly said the U.S.-Japan mutual defense treaty applies to the islands.

'The Diaoyu Island and its adjacent islets have been an inherent part of Chinese territory since ancient times, which is a unchangeable historical fact,' Foreign Ministry spokesman Lu Kang said after Japanese media reported that Mattis reiterated the islands fall under Article 5 of the security treaty on his first Japan trip since taking over the Pentagon."

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http://news.xinhuanet.com/english/2017-02/04/c_136029446.htm