I really do not know where to begin.
First of all congratulations.
Secondly, I guess that I was really shocked to read that you plan to out-source the care of your baby at one-year-old. This is common in the West where both couples need to work to maintain their car payments and housing rent. However, it's pretty unusual in China.
They do have them. Of course. Though, if you have seen what I have seen about Ai-ye misuse and attention of the baby, you wouldn't let any one within ten miles of your kids.
Most of China is traditional-conservative. Which means that the woman stays home and handles the budget, the domestic chores, and supports the family. The man supports the family financially.
Contemporaneously, in China, the wife ONLY goes to work when there is a family member in the house caring for the children. This task usually falls upon the grandparents. They typically move in with you and care for the child. This continues until the child is old enough to go to school. This is usually at age 6 or 7.
In lieu of that, you can rent a nanny to care for your baby at the house. This is common with many Chinese who don't have grandparents able to stand in, and the wife must work. The nanny would care for the child and make dinner and clean, etc. You can put a wanted ad in this form if that is what you would like. Though you do need to be careful.
I would advise that if you could arrange it, have your wife take care of the child until they are old enough to attend school. This system worked quite well In the United States. At least up into the 1980's when the monetary value of one USD fell below 15 cents. Now it is some where around one half a penny,
So both parents need to work... in the USA.
Not true in China, though. If you plan your life properly, you can maintain a very functional household and your children will benefit immensely.
I look at this as an excellent opportunity to start a new family, in a new place under new rules and ways of doing things. But that is just me, and I am very old-fashioned.
Here are your options rated from most expensive to cheapest.
[1] Outsource the care, and raising of your child to a day care.
[2] Outsource the care and raising of your child to a live-in nanny.
[3] Bring your parents over, and have them live with you and take care of the child.
[4] Your wife stays home and takes on a traditional housewife role and raises the child yourselves.
Everyone is different, and it is up to you to decide what is best for your child. I would offer to say that you do not know what things are going to be like for you in a year from now. Especially after you have lived in China for a spell. You might be surprised how your points of view on things have changed and migrated.
This entire issue is a very important one because what you are talking about is how to structure your family while you are in China. This is not something that should be taken lightly. It should be something that is planned.
The funny thing is that I have a blog post that I just wrote last week on this very subject. Who would figure? It's titled I suggest you take a read. It might help give you some insight in how to run your family while you are in China.
Best Regards, and again congratulations.