I'd say it works very well for the communist party.

It works for the politburo standing committee and Xi. The legal system are “stewards” for the Chinese government (according the white paper to Hong Kong).

Hence you find so many people in China vying for government jobs because if you climb high enough, the law is below you. That is very dangerous because the only accountability is the person on top.

She also happens to be the CFO of Huawei who (allegedly) personally lied to international banks to circumvent US export controls?

I'm not familiar with the court system in Canada, but criminal cases in the US take a long time. AFAIK Meng Wanzhou's delay is not unusual.

She will have a trial, we are pretty certain that ot will be fair. If the whole arrest was made frivolously she can sue and has great chance to get a rather big settlement.