An employee surnamed Liu from the Beijing Kangaroo Mama Services Center said most families choose nannies who charge between 8,800 to 10,800 yuan a month, with eight to 10 years of work experience.
The earlier these customers decide and reserve potential nannies, the better choice they have, Liu said.
Most of the nannies will live with their customers and provide 24-hour care and services.
They are expected to be especially busy this year.
The Chinese zodiac has a significant influence on the year that families choose to have children.
Many people believe that those born in the Year of the Horse, which falls this year, will be lucky and successful. But those born in the Year of the Sheep, next year, are said to experience ill fortune in their lives.
Xu Jiurong, 49, from Hubei province, has worked as a nanny in Beijing since 2007.
She earns more than 10,000 yuan a month.
"My schedule is fully booked till early next year," Xu said.
The demand for nanny services is so great this year that families should book them at least six months in advance, Xu said.
Before becoming a full-time nanny, Xu studied nursing and received special training on maternal care and childcare. She also trained in diet, nutrition and disease prevention, with the relevant certificates to prove her training.
Xu is now a senior nanny in the industry.
"I try to get to know my customers better before I start work and list the types of services I can provide the families. I also keep up to date on baby care through online and other resources," she said.
Despite her busy schedule this year, Xu said she is satisfied with what she does and regards looking after babies as a huge responsibility.
The money she earns helps cover her son's tuition in the United States.
Wu Shasha, who works in a State-owned enterprise, said she booked a nanny through friends for about two months when she was pregnant. She gave birth to a boy in February.
"The yue sao was very considerate. She came to the hospital when I was giving birth. Then she looked after me and my baby well in the next two months, making us dinner and washing our clothes, among other tasks."
Wu said she paid the nanny 10,000 yuan a month and felt at ease when the nanny stayed with her.