"The growing number of rich people in the country offer good prospects for sustained business growth," Peterson said.

China has more than 1 million people with assets above 10 million yuan, according to data from Hurun Research Institute, with numbers expected to surge in coming years.

Though no data is available to illustrate the valet boom in China, industry sources said due to the rising demand, a typical valet can earn as much as 20,000 yuan a month, more than triple the average salary in Beijing.

According to Peterson, the training school will launch a flagship store in Alibaba's online shopping platforms. However, it has not decided on what services will be moved online, she said.

"One possible option is joint purchasing, such as enabling dozens of families to hire one qualified butler to provide etiquette training classes," said Mo Ning, who is responsible for the promotion at Alibaba. "Such models will make it affordable for Chinese to access high-end services."

Ma Si contributed to this story.