In our previous DaFab post, we introduced the overall multi-site orchestration vision. This entry focuses on a specific architectural building block: integrating Karmada with Argo Workflows to enable multi-cluster and multi-site workflow execution driven by rule-based placement. The key outcome is that workflow steps can be dispatched to different Kubernetes clusters (sites) based on explicit rules that reflect data locality and computing resource availability goals, without changing how users author workflows.