2017 is the first whole year of Prime Minister Turnbull's administration.The ruling party had to cozy up with the right-wing political parties to consolidate its political status due to its failure of control over the parliament.Given the political competition domestically and increasing pressure imposed by the United States，a rightward shift in Turnbull's political and diplomatic policy occurred and resulted in a greater disparity in China-Australia political and diplomatic policies as well as in their views of Indo-Pacific security system and regional security architecture.As the largest trading partner and the most energetic economy，China speeds up its economic cooperation and trades with Australia，which is increasingly becoming the basis for intensified China-Australia relations and one of the most significant factors in sustaining Australian China policy.