Why is the detention of Huawei Chief Financial Officer Meng Wanzhou legal?

Sure, because of Iran's…

But: Ms. Meng is not an American citizen, was not detained in the US, and Huawei is a Chinese company.

Is it something like international law if the US or another country imposes sanctions on another country?

If I make a product now and sell it to an Iranian citizen, will the police be ringing with me soon?
What about an online product / website / app or similar?

The US has first filed an application for detention, followed by Canada. A determination as to whether the request is lawful will be made later by a court of law.

However, the real reason for the arrest warrant is conspiracy to commit fraud.

https://www.zeit.de/politik/ausland/2018-12/kanada-huawei-finanzchefin-festnahme-sanktionsverstoss-usa-auslieferung

Thanks for the article.

So it's SkyCom, not Huawei.

That it is a daughter company of Huawei, it has allegedly veiled against US banks.

And so the US authorities had to sue them…
Maybe because the banks have unintentionally violated the sanctions?!

Well, probably to legally secure. However, only the fraud against the banks remains stable, it should hardly get 30 years, because because of bypassed sanctions you can hardly get it off, after all, China has never signed a contract. It is interesting, however, whether Canada actually decides to deliver. The Amis is currently but a lot trusted, let's see how you turn a rope to punish you harder.

The woman is just manager at Huawei, so it should first turn the parent company. However, there's probably little interest in what the US is trying to patch him up with. Neither mother nor daughter sit in the States, so they do not have to stick to their sanctions. And after the US is currently trying to topple European companies into crisis with its tightened Iran policy, I would diligently buy a Huawei again.