US political interference looms large as a factor supporting her release.
Charges unsealed Monday accused Huawei of trying to take a piece of a robot and other technology from a T-Mobile lab.
McCallum listed several arguments the legal team representing Huawei’s CFO can make in her defence.
Says the treaty with Canada infringed on the “safety and legitimate rights and interests of Chinese citizens.”
Court would have to judge their relevance in deciding whether to follow through on the US extradition request.
Meng Wanzhou was detained in Vancouver on Saturday.