A senior Chinese military officer has warned a group of senior Japanese politicians that Tokyo should avoid expanding its security alliance with Washington if it doesn't want relations with Beijing to deteriorate, a source with direct knowledge of their meeting said+.

"Japan will have no future if it only follows the United States," the source, who spoke on condition of anonymity, quoted the officer as telling the group led by Masahiko Komura, vice president of the Liberal Democratic Party, last week in Beijing.

The officer, who belongs to a think tank affiliated with the People's Liberation Army, voiced opposition to an agreement between Prime Minister Shinzo Abe and President Barack Obama in late April to strengthen the Japan-U.S. military alliance in the face of China's increasingly assertive military posture in the Asia-Pacific region, the source said Sunday.