Mr Kovrig, along with fellow Canadian Michael Spavor, had become known worldwide as the "Two Michaels". Their detentions - under the claim that they were spies, which was denied by both - was widely seen as a tit-for-tat by Beijing in response to Canada's arrest of a Chinese businesswoman at the request of US authorities in December 2018.
Meng Wanzhou was no ordinary executive, but the chief financial officer of Huawei, the world's largest telecoms equipment maker and a poster child for the country's tech sector. She is also the daughter of the firm's founder, Ren Zhengfei, who was once a member of the Chinese People's Liberation Army.