Melbourne to Rome via Chengdu

Aliana, you are definitely eligible for 24 hour visa free transit and you do not need any kind of visa. Upon your landing in Chengdu, the first thing what will you do is to approach transit counter where you will apply for a temporary entry permit. This is free of any charge and here you will present your flight tickets and your hotel accommodation booking. After a short check, you will be granted a temporary entry permit and you will proceed through exit immigration toward your accommodation or if you want, you can also explore the city for a while. Enjoy your journey.