The big picture is the US will arrest Chinese executives if they don't obey US not international law. That's how they will stop China's ascendency in this world. On the other end, the media is already writing stories that US corporations will less likely do business in China due to fears they will be arrested in retaliation. The blanket charge is Huawei is a national security threat... to the US. But of course that makes Americans think they can act beyond the confines of the US. Can China do that? No, which should tell everyone in the world Americans don't believe in equality under any law. Remember the gave a waiver to South Korea where they can sell their products to Iran to which the charges against Huawei are based. They charge that China is working to undermine the world order. Why not since the world order plays favorites and works to undermine countries that don't bend the knee to the US into what is essentially volunteer slavery.
See how the media doesn't even mention this is kidnapping and extortion under the guise of the law. The fact is they can make up charges and hold foreign citizens prisoner for long amounts of time under the guise of due process. They can hold fake trials knowing the charges will be eventually dropped due to lack of evidence but that could take years. The US wants political hostages and prisoners. Because the US doesn't recognize they commit the very crimes they accuse of other countries of doing, that's called being a sociopath incapable of knowing right or wrong except for what serves themselves.
People are claiming Trump and Trudeau had no advanced knowledge of this arrest. If that's true, that's a case against their democracy. You can see why it's so important for them to make China into their version of democracy so they can influence those in power outside of elective office.