Until the 1960s，Canada had being following the United States closely in its policies towards the Asia-Pacific since the Second World War.The foreign policy debates of the Pierre Trudeau period，however，brought about the “Third Option”，which prompted Canada to play a more active role in the Asia-Pacific under its more liberal ideals.After the Cold War，with sovereignty controversies in the South China Sea and disputes arising from economic development becoming the major source of security concerns and regional conflicts in the Asia-Pacific，Canada seeks to tackle existing challenges through means unlike those deployed by the United States.By promoting the development of multilateral institutions and two-way diplomacy，Canada is seeking to relief regional tension，establish balance of power，and formulate a mode of regional governance marked by co-existence and co-development，so that Canada may strengthen its economic ties with China and other East-Asia or Asia-Pacific countries，as well as its international image as a peace-loving nation.