BEIJING • As millions of Chinese students sat a gruelling university entrance exam this month, stories of how an identity theft scandal robbed hundreds of previous candidates of their dreams have set social media alight.

Officials in the eastern province of Shandong said a two-year investigation had found more than 280 people involved in stealing the identities of students sitting the "gaokao".

The announcement prompted public outcry and Chinese lawmakers to vow a crackdown on corruption in the sector.

The gaokao is typically the most stressful point of a student's life, where a high score can drastically improve the future prospects of poor students in rural areas.

China's top universities rely heavily on a high gaokao score for admissions, increasing the pressure on students.

Nearly 11 million candidates sat this year's exam, which had been delayed for a month due to the coronavirus pandemic.

While fraud is a persistent problem in the country of 1.4 billion people where competition for the relatively few places in the top universities is fierce, the scale of the Shandong scandal has left many shocked.

Most of the cases pre-dated 2006 and officials blamed poor identity verification methods at the time for the failure to detect the cheating.

So far, 46 people have been punished, the Shandong government said without providing details.

Among the victims was Ms Gou Jing, who wrote on social media network Weibo that her former teacher's daughter stole her identity in 1997.

Normally a high achiever, Ms Gou said she got a poor mark on the exam and as a result, became a migrant worker, while the other student went to college in Beijing and became a teacher.

Ms Gou said she was not sure how her identity was stolen, but suspects her score was given to the other student or that the impostor used a fake ID card with her name to enter the exam hall.

The government said the impostor has been stripped of her academic qualification and fired from her job.

"At the time, I didn't have the wisdom or experience to suspect that people would dare mess with gaokao scores - I couldn't even imagine the possibility," Ms Gou told Phoenix News.

She added on Weibo that the teacher sent her a handwritten letter of apology in 2003.

"Impersonation is abhorrent, and the crimes of malfeasance and bribery involved in the process of fraud should be investigated as well," she said. "If any links in the chain are not cleaned up, more people will become fraud victims."

Hashtags related to the Shandong cases, Ms Gou's experience and that of another former student Chen Chunxiu have racked up almost a billion views on Weibo.

While some netizens accused Ms Gou of exaggerating her claims, most were critical of the impostors and the government's handling of the issue.

"Justice served late is not justice. If it hadn't been for Weibo, would (officials) still have bothered to investigate?" said one post.

Ms Chen, who also comes from a rural family, scored poorly in the 2004 exam after her identity was stolen by a classmate with family connections to the local government, according to the results of the Shandong probe that began in 2018.

She also became a migrant worker, while the other student studied at Shandong University of Technology and got a job as a local government auditor.

The impostor, another woman whose surname is Chen, has been sacked from her position.

Lawmakers are now debating criminalising gaokao identity theft. The Education Ministry pledged on Thursday to investigate future cases of gaokao fraud and disqualify offenders from enrolling in higher education.

AGENCE FRANCE-PRESSE