For a private citizen visiting out of a personal interest, Taiwan sure made a lot of fuss over the former Prime Minister Tony Abbott. That's because his recent visit seems to be part of a larger, very complicated diplomatic dance Australia is engaged in, designed to keep China happy and Taiwan safe. So is it working? Today on the Signal, how close is China to invading? And if Beijing did decide to do that, would Australia join a war over it? Featured: Natasha Kassam, Director of the Lowy Institute's Public Opinion and Foreign Policy Program