About 10 years ago, there was a private hospital in South Perth which provide excellent service. They delivered babies and also did day cases (surgery). Their staff were excellent in services. Many of them are Chinese came from Malaysia/Singapore. They spoke fluent English/Mandarin/Cantonese. All of them must have at least 10 years working experience before getting a job in that private hospital.
But around 8 years ago, they stopped for the delivering babies and became a surgical ward focusing on private cases.
I was told some midwifes went to Bentley hospital for the practice. Thus You may check it with Bentley hospital, maternity ward for details. You may check with them for anyone may speak mandarin.
You may also check with the above private hospital in South Perth, whether they restart midwifery service?
The hospital in South Perth is called as South Perth Community Hospital.