It's up to you what you want to do with the issue. But if you want to take actions, you can study up on DMCA law. As the holder of the copyright, you have the right to evoke the law in order to get the website to remove your story. Do understand though, that you need to be very concise and factual. If you're fighting for your copyrighted materials to be taken down, you must first be able to prove that it's you who owns the copyright.
If you post on Webnovel, the chinese website, this may not be the case. As you lend your copyright to them and therefore, they can do whatever they want with your story for as long as your story is on their site. But if you remove it and repost it elsewhere, then you lose the evidence of your copyright and gave it up to Webnovel, where you posted it first or is the place where the piracy was committed.
You also must not lie. Lying when filing for DMCA is akin to perjury.
