To better pass down the techniques Liu has developed, she began to write them down while seeking advice from medical professors. "If you want to lead the industry, you need to constantly create something new," she said.

"That 'something new' includes a guidebook for maternity matrons."
"One piece I wrote is about decoding baby's cries," Liu said, explaining that crying is a normal behavior in infants. Family members of newborns will easily understand the reason for the tears if they get the point.

"For example, if a baby is hungry, it sounds like it is fairly desperate and unrelenting. The cry turns intermittent if the baby is tired and needs to sleep," Liu added.

Liu's book also covers some other specific details about caring for a nursing mom, breastfeeding problems and when to call the doctor.

Apart from writing books and analyzing recent cases, Liu pioneered opening a class for grandmothers, who may have their own ideas about mother and baby care.

"It is easy to teach a new mom, but not to their moms or mothers-in-law, most of whom consider it is unnecessary to employ a maternity matron, as it is quite an expensive business," Liu said.

"To serve that kind of family, you need to acquire their trust first. Harnessing more skills can make you more incredibly persuasive," Liu said.

Liu started training others in 2005. For the first several months, she offered training classes twice a month but now it's four times each month. "The highest number of trainees could reach as many as 270," Liu said.