Many years ago I read in one the Jane's books on military strategy that the obvious thing for China to do in the future would be to invade Australia. We need a strong military.
One might want to read, Professor Clive Hamilton's book "Silent Invasion". This book details the Chinese 'influence' already apparent in the antipodes. It was dropped by two publishers (wonder why) before being published.
Grubs like Sam Dastyari, given refuge from a supposedly tyrannical regime, promptly sold out his protector and he wasn't the only one....
The Chinese didn't need to fire a bullet.