A three-year visit visa to Australia requires the applicant to purchase insurance for 12 months before the visa can be approved. Here are the visa terms. When buying insurance, it is best to buy insurance in Australia, because they can usually meet the requirements of the Australian Immigration Bureau. Usually, the insurance premium is about 1500 Australian dollars, which is about 7500 RMB according to the exchange rate of 5. If/kloc-has not stayed in Australia for 0/2 months, you can explain it to the insurance company before departure and record the time. You can continue to use this insurance next time you go to Australia. The insurance time is calculated according to the actual stay in Australia. In addition, although the Immigration Bureau only requires you to buy insurance before your visa is approved, you still need to buy it consciously when you enter Australia next time. If the Immigration Bureau later finds out that you didn't buy insurance, it will cancel your visa and leave a bad record.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.