Try 母嬰康逸社, there's a request form on the website.
<women.labouraid.org/a1.php>
My puiyuet was found from there, she was very caring, taught me how to breastfeed, and knows how to handle bb well. She gave me advise on how to save $ too, haha... She also helped to teach my maid to cook and handle bb.
Agent would allocate a puiyuet for you, and we talk on the phone first, then she came to my home for interview. She had the contract prepared, and if you are ok, can sign on the spot, very convenient.
During the interview, i just told her that it was my first baby, i know nothing, and asked her what she can do for me in that one month, and she told me many many things, made me feel that she was knowledgeable! I end up hiring her for 1.5 months.