diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
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+# Code of Conduct
+
+QuantDinger is an open, inclusive, and respectful community. We expect all participants to help maintain a harassment-free experience for everyone.
+
+---
+
+## 1) Our Pledge
+
+We pledge to make participation in our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+---
+
+## 2) Our Standards
+
+Examples of behavior that contributes to a positive environment include:
+
+- Being respectful and kind
+- Being open to feedback and different viewpoints
+- Focusing on what is best for the community and users
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior include:
+
+- Harassment, intimidation, or discrimination
+- Insults or derogatory comments
+- Trolling, personal attacks, or sustained disruption
+- Publishing others’ private information without explicit permission
+- Sexual language or imagery in non-appropriate contexts
+
+---
+
+## 3) Scope
+
+This Code of Conduct applies to all community spaces, including:
+
+- GitHub issues, pull requests, discussions, and code reviews
+- Any official community channels linked from this repository (e.g., Telegram/Discord)
+- Project-related events and communications
+
+---
+
+## 4) Reporting
+
+If you experience or witness unacceptable behavior, please report it as soon as possible.
+
+Preferred channels (choose one):
+
+1. GitHub: open an issue labeled **conduct** (do not include sensitive private info).
+2. Email: contact the maintainers via the email listed in `README.md`.
+
+If there is an immediate safety risk, please contact your local emergency services first.
+
+---
+
+## 5) Enforcement
+
+Project maintainers are responsible for clarifying and enforcing our standards of acceptable behavior. They may take any action they deem appropriate, including:
+
+- Warning
+- Temporary ban from community spaces
+- Permanent ban from community spaces
+- Reverting/rejecting contributions that violate this Code of Conduct
+
+---
+
+## 6) Attribution
+
+This document is inspired by the Contributor Covenant and common open-source community standards.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+# Contributing
+
+Thanks for your interest in contributing to **QuantDinger**! This guide explains how to report issues, propose changes, and submit pull requests.
+
+---
+
+## 1) Quick links
+
+- **Issues**: use GitHub Issues for bugs and feature requests.
+- **Discussions**: use GitHub Discussions for Q&A and ideas.
+- **Community**: official channels are linked in `README.md` (Telegram/Discord).
+
+---
+
+## 2) Ways to contribute
+
+- **Report bugs**: provide steps to reproduce plus logs/screenshots.
+- **Request features**: describe the use case, expected behavior, and alternatives.
+- **Improve docs**: fix typos, clarify setup, add examples.
+- **Submit code**: bug fixes, refactors, and new features.
+
+---
+
+## 3) Before you start
+
+- Please read and follow [`CODE_OF_CONDUCT.md`](CODE_OF_CONDUCT.md).
+- Keep changes focused and small when possible (easier review and safer merges).
+- If you plan a large change, open a discussion/issue first to align on design.
+
+---
+
+## 4) Development setup
+
+This repo contains:
+
+- `backend_api_python/`: Flask backend + strategy runtime
+- `quantdinger_vue/`: Vue 2 frontend
+
+### Backend (Python)
+
+```bash
+cd backend_api_python
+pip install -r requirements.txt
+cp env.example .env # Windows: copy env.example .env
+python run.py
+```
+
+### Frontend (Vue)
+
+```bash
+cd quantdinger_vue
+npm install
+npm run serve
+```
+
+---
+
+## 5) Branching & PR workflow
+
+### Branch naming
+
+Use a clear prefix:
+
+- `fix/xxx` for bug fixes
+- `feat/xxx` for new features
+- `docs/xxx` for documentation
+- `chore/xxx` for maintenance tasks
+
+### Pull requests
+
+1. Fork the repo and create a new branch from `main`.
+2. Make your changes with clear, focused commits.
+3. Open a PR with:
+ - What changed and why
+ - Screenshots/GIFs for UI changes
+ - How to test (commands, steps)
+ - Backward compatibility notes (if any)
+
+---
+
+## 6) Commit messages
+
+Recommended format (similar to Conventional Commits):
+
+- `feat: ...`
+- `fix: ...`
+- `docs: ...`
+- `refactor: ...`
+- `chore: ...`
+
+---
+
+## 7) Coding guidelines
+
+### General
+
+- Prefer clarity over cleverness.
+- Keep functions small and cohesive.
+- Add comments only where necessary (the code should be the primary documentation).
+
+### Python
+
+- Prefer explicit error handling and helpful error messages.
+- Avoid storing secrets in code or committed files; use `.env`.
+
+### Frontend
+
+- Keep UI changes consistent with existing Ant Design Vue patterns.
+- Avoid breaking i18n keys; reuse existing language keys where possible.
+
+---
+
+## 8) Tests & verification
+
+We don’t enforce a single test command across the whole monorepo yet. Please at least:
+
+- Backend: run the API locally and verify affected endpoints
+- Frontend: run the dev server and verify affected pages/components
+
+If you add a bug fix, please add a minimal regression test when practical.
+
+---
+
+## 9) Security
+
+Please **do not** open public issues for security vulnerabilities.
+
+For security reports, contact the maintainers via the email in `README.md` and include:
+
+- A description of the issue
+- Steps to reproduce / proof of concept
+- Impact assessment (what could an attacker do?)
+
+---
+
+## 10) License
+
+By contributing, you agree that your contributions will be licensed under this project’s license (see `LICENSE`).
diff --git a/README.md b/README.md
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+ 
diff --git a/README_CN.md b/README_CN.md
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+++ b/README_CN.md
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+
diff --git a/README_JA.md b/README_JA.md
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+
diff --git a/README_KO.md b/README_KO.md
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--- a/README_KO.md
+++ b/README_KO.md
@@ -38,6 +38,7 @@
+
diff --git a/README_TW.md b/README_TW.md
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--- a/README_TW.md
+++ b/README_TW.md
@@ -38,6 +38,7 @@
+