The woman remembers the first time she got a smartphone.

It was 2011, and she was living in Hotan, an oasis town in Xinjiang, in northwest China. The 30-year-old, Nurjamal Atawula, loved to take pictures of her children and exchange strings of emoji with her husband while he was out. In 2013, Atawula downloaded WeChat, the Chinese social messaging app. Not long after, rumors circulated among her friends: The government could track your location through your phone. At first, she didn’t believe them.

In early 2016, police started making routine checks on Atawula’s home. Her husband was regularly called to the police station. The police informed him they were suspicious of his WeChat activity. Atawula’s children began to cower in fear at the sight of a police officer.

The harassment and fear finally reached the point that the family decided to move to Turkey. Atawula’s husband, worried that Atawula would be arrested, sent her ahead while he stayed in Xinjiang and waited for the children’s passports.

ABOUT THIS STORY This article is a co-production with Coda's Authoritarian Tech channel.

“The day I left, my husband was arrested,” Atawula said. When she arrived in Turkey in June 2016, her phone stopped working—and by the time she had it repaired, all her friends and relatives had deleted her from their WeChat accounts. They feared that the government would punish them for communicating with her.

She was alone in Istanbul and her digital connection with life in Xinjiang was over. Apart from a snatched Skype call with her mother for 11 and a half minutes at the end of December 2016, communication with her relatives has been completely cut. “Sometimes I feel like the days I was with my family are just my dreams, as if I have been lonely all my life—ever since I was born,” she said.

Atawula now lives alone in Zeytinburnu, a working-class neighborhood in Istanbul. It’s home to Turkey’s largest population of Uyghurs, the mostly Muslim ethnic minority native to Xinjiang, a vast, resource-rich land of deserts and mountains along China’s ancient Silk Road trade route.

Atawula is one of around 34,000 Uyghurs in Turkey. She is unable to contact any of her relatives—via phone, WeChat, or any other app. “I feel very sad when I see other people video chatting with their families,” she says. “I think, why can’t we even hear the voice of our children?”

For Uyghurs in Xinjiang, any kind of contact from a non-Chinese phone number, though not officially illegal, can result in instant arrest. Most Uyghurs in Turkey have been deleted by their families on social media. And many wouldn’t dare try to make contact, for fear Chinese authorities would punish their relatives. It’s just one of the ways President Xi Jinping’s government maintains a tightly controlled net of surveillance over the Uyghurs in China, and it has a ripple effect on Uyghurs living all over the world.

Zeytinburnu, the Istanbul suburb where Atawula lives, lies behind the city’s winding expressways, and is dotted with restaurants and cafés serving Uyghur cuisine: wide, slippery noodles, lamb kebabs, and green tea. The Uyghur separatist flag—a light blue version of the Turkish flag—is a common sight. It’s a banned image in China, representing East Turkestan, the name for Xinjiang despised by the Chinese government that almost all Uyghurs here give to their homeland.

Xinjiang—meaning “new frontier” in Chinese—was brought under the Communist Party of China’s control in 1949. During the latter half of the 20th century, Uyghur independence was a threat that loomed over the party’s agenda. The government tried to stamp out separatism and “assimilate” the Uyghurs by encouraging mass migration of Han Chinese, China’s dominant ethnic group, to Xinjiang.

During the ’90s, riots erupted between Uyghurs and Chinese police. In a white paper published in March, the Chinese government defined the riots as “inhuman, anti-social and barbaric acts” perpetrated by separatist groups. Amnesty International, meanwhile, described the 1997 protests in Gulja, Xinjiang, as a peaceful demonstration turned massacre, quoting exiled Uyghur activist Rebiya Kadeer. “I have never seen such viciousness in my life,” she said. “Chinese soldiers were bludgeoning the demonstrators.”