If there's no need for calling, can't you just rent a WiFi after arriving at the airport ?
3 Answers
Renting a Wi-Fi is not cost-effective. It's more convenient to buy a card.
If you use Google navigation, you must use a local card, which means buying it on Taobao and bringing it with you.
Just checked, the 5-day Oceania international roaming package costs around 70 yuan.