（DCS系统）和（机器人系统）及（大型伺服控制系统）备件大卖！叫卖！特卖！卖卖卖！
A view of the burned luxury apartment of the family murdered by their nanny in Hangzhou, East China's Zhejiang Province, 22 June, 2017. Photo: IC

A nanny who recently murdered the three children she was paid to care for along with their mother by setting fire to the family's luxury apartment in Hangzhou, East China's Zhejiang Province, has put China's chaotic housekeeping market under intense scrutiny.

Local police announced Wednesday that they have arrested the nanny on charges of arson and theft. The authorities said that the victims were pronounced dead at a local hospital.

Two boys aged six and 11, and their nine-year-old sister, were found lying beside their mother when firefighters broke into the four-bedroom apartment. The woman's husband was away on business, local media said.

The nanny, who was named as Mo Huanjing by The Beijing News, was reportedly hired by the family through a Shanghai housekeeping agency last year, and seemingly got on well with her employers. They paid Mo a monthly salary of 7,500 yuan ($1,097), invited her to their friends' parties and even lent her 100,000 yuan to buy a house.

But Mo was allegedly addicted to gambling and in trouble with loan sharks. She came to Hangzhou from her hometown of Dongguan, Guangdong Province, and it is suspected that she was fleeing her creditors.

The tragedy has drawn wide public outcry. The hashtag "Hangzhou nanny sets apartment on fire" generated 200 million views on Weibo by press time, with netizens posting more than 132,000 comments.

Many netizens criticized Mo's cruelty and blamed the chaotic housekeeping market in which nanny agencies do not do enough to vet nannies.

Low threshold

"The most important requirement is that you are willing to be a nanny," a manager surnamed Gao at a domestic worker company in Beijing's Tongzhou district told a Global Times reporter posing as a jobseeker.

Generally, potential nannies need to have a health certificate which only shows blood test results and a valid ID, but according to Gao, the health certificate is not a necessity.

"We don't have any kind of psychological tests or interviews for jobseekers, whether you can get on with your employer matters more," Gao said.