In the Canadian city of Vancouver a woman named Meng Wanzhou is under house arrest in her $4.2bn mansion. Chief financial officer of the Chinese tech firm Huawei, and the founder’s daughter, she’s accused by the US of bank fraud and violating sanctions against Iran. But as the BBC’s Silicon Valley Reporter Dave Lee tells Beyond Today, her arrest is about more than this: we might look back on it as the opening salvo in the tech cold war.

Reporter: Harriet Noble