> For the complete documentation index, see [llms.txt](https://bbc.gitbook.io/bbc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bbc.gitbook.io/bbc/4.0-eco-development-planning.md).

# 4.0 Eco-development planning

- [4.1 Phase I: Basic Functions and Initial Ecology](https://bbc.gitbook.io/bbc/4.0-eco-development-planning/4.1-phase-i-basic-functions-and-initial-ecology.md)
- [4.2 Phase II: Expansion and deeper cooperation](https://bbc.gitbook.io/bbc/4.0-eco-development-planning/4.2-phase-ii-expansion-and-deeper-cooperation.md)