Okay, the user wants me to translate "side-chains" into Simplified Chinese. Let me check if it's already in Simplified Chinese. The term "side-chains" is an English term, so it's not in Chinese. The correct translation for "side-chains" in the context of blockchain technology is "侧链". I need to make sure there's no other possible translation, but "侧链" is the standard term used in Chinese blockchain discussions. So the translation should be "侧链".