do i need visa for entering Macau? i am chinese citizen but resides in Australia?

Now that you are holding Chinese passport and valid Australian residence permit, you can stay for 7 days in Macau without the entry permit. If you want to extend the stay duration, you can go to the Immigration Affairs Office of Macao Public Secuirty Police Force five days before the current granted stay expires to submit the application for stay duration extension. The maximum extension is 90 days.