# 选择你的 Chain ID

选择一个唯一标识您链的 Chain ID。稍后将用于设置 MetaMask。

```
98989897
```

使用以下方式检查该 Chain ID 是否已被占用 <https://chainlist.org/?testnets=true>.

MetaMask 使用 ChainList 来建议链的详细信息，例如名称和货币，如果您使用了已有的 Chain ID 它会提示错误。因此请确保选择一个新的唯一 Chain ID。

如果您打算将链部署供公众使用，请将您的链添加到 [ChainList](https://chainlist.org/) 中。


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.rome.builders/zh/legacy/rome-l2-setup/setup-your-l2/choose-your-chain-id.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.