Here's an outside perspective for you for earlier this year.
It's a hot topic here, naturally, especially recently with Huawei's CEO being held under house arrest in Vancouver pending extradition to the US.
It's not just Huawei that's considered a security threat. Last year, Chinese firm CCCI was blocked from purchasing a large Canadian construction company that handles infrastructure projects - for security reasons. The fear, from what I could gather from Radio interviews, is that Chinese companies are required to cooperate with the Chinese government in certain matters, which means that any information held by a Chinese company can be used by the Chinese Government.
This is a subject I'm only casually following, however. It's not the kind of thing I could ever hoped to be informed enough about to form a proper opinion.