China denies it, but Uighur exiles who fled to EU states say they are still being terrorised by threatening phone-calls, SMS-es, and other forms of what some security services have dubbed "refugee-espionage".
One such call, from a masked number, came on a day in July 2019 when Yashar Yalkun, a Uighur activist and Belgian asylum holder, was playing with his infant son at home in Antwerp, a Belgian city.
It was his mother and sister in China, whom he had not heard from in three...
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