Chinese nationals living in the U.S. have shared what they claim to be undercover video from a labor camp in China where their family member died 15 years ago after allegedly being persecuted for practicing Falun Gong.

Yifei Wang told KTTV Fox11 Los Angeles she was with her now deceased sister, Kefei, in Tianenmen Square in Dongcheng, China in 2001 showing their support for the spiritual meditation and breathwork practice which is also referred to as Falun Dafa.

Both of them were captured and taken to a labor camp, she said, but only Yifei made it out alive with the help of a guard and she and her family were later told Kefei died of a heart attack.

But after seeing her body in the hospital around the time of her death, the family said they became certain she was tortured, and secret video recorded by others shows abusive treatment of people in the camps, with some emaciated, shackled to beds and suffering from lesions on their faces and bodies.

Now, a media company called Swoop Films is working to bring the persecution of Falun Gong worshippers in China to light in a documentary titled, 'Finding Courage.'

WARNING: CONTAINS GRAPHIC VIDEOS AND IMAGES

Persecution of Falun Gong followers at the hands of the Communist Party of China, which is the founding and ruling political party of the People's Republic of China, has been well documented.

'Amnesty International has documented severe and widespread human rights violations against Falun ​​​​​​Gong practitioners,' Francisco Bencosme, Asia Advocacy Manager for Amnesty International, told Fox11.

'We have documented cases of torture, inhumane practices, lack of freedom of expression, and unfortunately they’re sort of out of sight, out of mind.'

Yifei Wang (right) and her husband Gordon (left) have shared what they claim to be video from the Jilin women’s labor camp in China where Yifei's sister Kefei died after alleged persecution for practicing Falun Gong

Yifei Wang told Fox11 she was with her now deceased sister, Kefei (left and right), in Tianenmen Square in Dongcheng, China in 2001 showing their support for the spiritual meditation and breathwork practice which is also referred to as Falun Dafa. Both of them were captured and taken to a labor camp, she said, but only Yifei made it out alive with the help of a guard and she and her family were later told Kefei died of a heart attack

In 2008, Falun Gong was listed by Chinese state media first among 11 groups identified as cults, claiming its subscribers 'have committed many crimes' and 'Leader Li Hongzhi exercises "extreme spiritual control" over followers.'

As of at least 2014, according to Public Radio International, Falun Gong as a group had no history of violence or terrorist activities, and yet was still juxtaposed by the Chinese state with groups including 'Almighty God' and 'Three Grades of Servants,' which consist of members who have been blamed by authorities for at least 20 murders.

Meanwhile, Christianity Today has characterized the practice of Falun Gong as a 'peaceful exercise movement.'

Fox11 reported that at one point the number of Falun Gong supporters outnumbered the people in the Communist Party of China, which has been speculated as one reason for the imprisonment and oppression of those who follow the faith.

After seeing her body in the hospital around the time of her death, the family said they became certain Kefei was tortured, and secret video recorded by others shows abusive treatment of people who died in the camps, with some emaciated, shackled to beds and suffering from legions on their faces and bodies. Yifei (pictured) struggles to this day to mention her sister without sobbing

The people in charge of the Jilin women’s labor camp (shown), however, have refused to show her body to her family for the past nearly two decades

Yifei, who struggles to mention her sister without sobbing, told Fox11 that people at the camp said Kefei died from a heart attack around the age of 30.

'I can’t even think about her, because when I do, it always breaks my heart,' Yifei said. 'I think about when we were young and would play together, she was a brilliant girl.'

The people in charge of the Jilin women’s labor camp, however, have refused to show her body to her family for the past nearly two decades.

In 2015, Yifei's husband, Gordon, went to the labor camp where Kefei was held to try to get access to the body.

During that visit he secretly filmed the current labor camp director telling him that he could see Kefei's remains if he agreed that she had died of 'natural' causes.

In 2015, Yifei's husband, Gordon, went to the labor camp where Kefei was held to try to get access to the body. During that visit he secretly filmed the current labor camp director (pictured) telling him that he could see Kefei's remains if he agreed that she had died of 'natural' causes. 'You want to see the body, I can do that, if you agree she died naturally,' the director can be heard saying in the video, as translated in Fox11's report

'You want to see the body, I can do that, if you agree she died naturally,' the director can be heard saying in the video, as translated in Fox11's report.

Gordon and other family members of Kefei then reply, 'You don’t have proof it was natural. To put it simply, director, she didn’t die of normal causes.'

The family pressed the director on whether the body was even still there and the director said she knew it was because she had personally been seeing to the payment made to the morgue every six months.

While there, Gordon used hidden camera devices concealed in objects like car keys and watches to record video of people being abused.

Ming Yu (pictured), a family friend of Yifei, who also escaped a labor camp where he was taken as a Falun Gong worshipper, risked his life to go back in and record his own undercover video

Ming Yu, a family friend of Yifei, who also escaped a labor camp where he was taken as a Falun Gong worshipper, risked his life to go back in and record his own undercover video during the 2008 Beijing Olympic Games.

Yu's recordings showed a man who had died in a vegetative state while shackled to a bed, with his widow sobbing over top of him.

Yu said the man had been arrested for following Falun Gong and was tortured and beaten until he had a stroke.

His footage also showed people working relentlessly at a camp, with some becoming so exhausted they were forced to sleep under the tables where they had spent hours working without breaks.

Yu's recordings showed a man who had died in a vegetative state while shackled to a bed, with his widow sobbing over top of him

The shackles on a person at a Chinese labor camp are shown in footage recorded by Yu

His footage also showed people working relentlessly at a camp during the 2008 Beijing Olympic Games

Some seen in the footage becoming so exhausted they rested on the tables they worked at

Others were forced to sleep under the tables where they been working for hours with no break

The before (left) and after (right) images of a person in a Chinese labor camp are shown

Others could be seen severely emaciated. An emaciated woman at a labor camp is shown

The legs of a woman who is severely emaciated at a Chinese labor camp

Others could be seen severely emaciated and with untreated legions on their faces and bodies.

Yu stressed the danger involved with documenting what is happening to Falun Gong followers in China.

'If you’re ever caught doing this kind of thing, videotaping the details of what’s happening in these camps, you would lose your life,' he said. 'The Chinese Communist party has a quota of people to be killed, and I am one of them.'

Other people were captured on camera suffering from legions on their faces and bodies

Yu stressed the danger involved with documenting what is happening to Falun Gong followers in China. A man is shown at a labor camp in China

'If you’re ever caught doing this kind of thing, videotaping the details of what’s happening in these camps, you would lose your life,' Yu said. An image from the Finding Courage documentary is shown

'The Chinese Communist party has a quota of people to be killed, and I am one of them,' Yu said. An image of an emaciated man laying down a a Chinese labor camp is shown

Swoop Films producer Kay Rubacek said, 'We’re talking about brutal torture, and for what? For standing up for freedom of belief, something we take for granted.' A person who was allegedly beaten by police at the Masnjia Labor Camp is shown

A legion is shown on a man's body as captured on hidden camera at a labor camp in China

Swoop Films producer Kay Rubacek said, 'We’re talking about brutal torture, and for what? For standing up for freedom of belief, something we take for granted.'

Referring to Kefei, she added, 'This not someone who died of a heart attack.'

Last week in New York City close to 10,000 Falun Gong followers marched to bring awareness to what has been happening for decades in China, with some holding signs that read, 'Free Sister’s Body' in reference to Kefei.

Similar demonstrations have been held in Los Angeles, with people holding images of loved ones lost to the labor camps.

Last week in New York City close to 10,000 Falun Gong followers marched to bring awareness to what has been happening for decades in China, with some holding signs that read, 'Free Sisters Body' in reference to Kefei (sign pictured)

Similar demonstrations have been held in Los Angeles with people holding images of loved ones lost to the labor camps (shown)

Yifei and Gordon plan to keep fighting to get access to Kefei's remains, with the goal of a proper burial for their loved one and having an autopsy performed to hopefully reveal once and for all what caused her death all those years ago.

'I wanted to get the truth out about Kefei’s death,' Gordon said. 'And I wanted to get her body released. I want to be able to give testimony about the things that happened to my family. The government doesn’t follow any laws. I will never give up to get her body back.'

DailyMail.com could not immediately reach the Chinese embassies in either New York City or Washington, DC for comment.