Is there a future for Australia to study international law and return to China for employment?

You are right, but if you are really interested in law, you can successfully complete your studies and accumulate some work experience in the local area. After returning to China, your employment prospects will be quite good, and you can work in a foreign law firm with a very high income. In fact, being a lawyer is not only about litigation, but also about corporate affairs (such as listing), and these non-litigation businesses are the most profitable. In view of civil economic disputes, lawyers can also mediate and strive for more benefits for the parties. Moreover, as far as I know, most of the law undergraduates in Australia are double majors, such as business/law, engineering/law and so on. Even if you don't become a lawyer in the future, you can engage in other industries.