But the scammers told her a wedding planner could earn a higher salary depending on the commission.
It was then arranged for the woman, who had an interest in wedding planning, to take a free training course in Hong Kong in June.
A week later she was required to pass a wedding planning exam in Fuzhou, Fujian province, which included a mock marriage to a man of a similar age, she said.
She and her "husband" signed a document at a local government office and were officially married.
The syndicate told the victim there would be no problem because they knew the mayor.
"They said they would void [the marriage record] afterwards," she said.
When the woman returned to Hong Kong, her friend convinced her it was a scam.
She said she sought help from the Hong Kong Federation of Trade Unions (FTU) after police in the city seemed reluctant to handle the case.
The woman's former high school teacher later helped her collect evidence on the mainland.
They revisited the government building in Fuzhou and found the wedding document she signed and another from a Hong Kong law firm, falsely signed in her name declaring she was single.
Tong Kang-yiu, director of the FTU's rights and benefits committee, believed the woman was just one of many victims of the racket.
"We hope that by sharing this case, those who haven't realised they were scammed will be aware," Tong said.
He declined to speculate on whether the motive for the scam was to let the victim's husband settle in Hong Kong.
"The police failed to handle the case instantly. We need to give the police more pressure to take this problem seriously," he said.
"We handed the case to the police for investigation. We are still waiting for advice from lawyers for further action."
Mainland residents with a spouse in Hong Kong can apply for a one-way permit to settle in the city.
The issuance of permits is capped at 150 per day.
Sung Siu-kin, vice-director of the Hong Kong Beauty and Fitness Professionals General Union, said youngsters should familiarise themselves with companies' backgrounds when looking for jobs.
Three ringleaders of a syndicate that lured young Hongkongers into sham marriages were found guilty of fraud in the District Court last Friday.
The trio were convicted of conspiracy to defraud and will be sentenced next month.
-South China Morning Post