# Serialization Graph > * 如有錯誤處指正或任何建議，懇請留言，感謝! > * 搭配 ChatGPT 進行翻譯，請小心服用 > * ▸ ... 為英文原文 :::spoiler ... Stores are serializable as the application is paused on the server and resumed on the client. Data in a store isn't required to be free of nested references. Qwik is perfectly happy serializing stores that feature data [cycles](https://wikipedia.org/wiki/Directed_acyclic_graph). Stores can also include [Qwik URLs (QRLs)](https://qwik.builder.io/docs/advanced/qrl/). There is no limit to how many stores can be created per component, nor to where they are passed. While the best practice is to implement top-down data flows, Qwik doesn't require this design philosophy. > **Your task**: Insert a few items into `parent.children` to create a circular reference between the parent and child stores. This example also shows how to attach and invoke closures to a store using `$` and `QRL`. ::: ###### tags: `Stores`