KONTAN.CO.ID - BEIJING. The United States is the world's biggest source of instability and its politicians are going around the world baselessly smearing China, the Chinese government's top diplomat said on Saturday in a stinging attack at a G20 meeting in Japan.

Relations between the world's two largest economies have nose-dived amid a bitter trade war - which they are trying to resolve - and arguments over human rights, Hong Kong and U.S. support for Chinese-claimed Taiwan.

Meeting Dutch Foreign Minister Stef Blok on the sidelines of a G20 foreign ministers meeting in the Japanese city of Nagoya, Chinese State Councillor Wang Yi did not hold back in his criticism of the United States.