> For the complete documentation index, see [llms.txt](https://andelf.gitbook.io/tron/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://andelf.gitbook.io/tron/internals.md).

# Internals

- [超级代表和投票](https://andelf.gitbook.io/tron/internals/witness.md)
- [产块和维护周期](https://andelf.gitbook.io/tron/internals/maintenance.md)
- [提案和链升级](https://andelf.gitbook.io/tron/internals/proposal-and-upgrade.md)