Michael Ma was born in Hong Kong and immigrated to Canada when he was 12. He was raised and educated in Vancouver
https://en.wikipedia.org/wiki/Michael_Ma
I can find no reference to his age, or to the year in which he immigrated to Canada. Hong Kong was transferred to China on July 1, 1997, 29 years ago, so I could not determine if he immigrated to Canada when Hong Kong was British, or part of China. But unless he is younger than 41, it was before Hong Kong was transferred back to China, and he would probably have been, rough;y interpreted, a British Subject in Limbo, (A British passport to the rest of the world but not really a British passport in Britain). This certainly goes towards addressing any issue of bias, and if he could hold a Chinese passport by birth.
https://passportia.org/en/uk-citizenship-hong-kong.php
This certainly does put an interesting twist on the Canada-China dialogue. It is really difficult to sort through fact-from-fiction, depending on where you were indoctrinated with your Chinese history knowledge.
Politics is politics. To understand the questioning, it must be understood that this witness was NOT selected as an unbiased witness, but was selected specifically BECAUSE of her bias towards the issue, and towards China. She was an assistant deputy minister, which basically means an unelected politician specifically indoctrinated in the policies of the political party in power at the time. Her position was well understood long before she took the stand. There was no hope of getting any unbiased neutral ‘facts’ from her from the get-go.