TheGuiding Opinions on Strengthening Digital Government Constructionexplicitly emphasizecross-level, cross-department, cross-system, cross-region, and cross-business collaboration, aligning exactly with the
"Five Crosses" concept.

The Guidelines specify that data from the Party Committee, People's Congress, CPPCC, supervisory and judicial organs, and the military is connected through a"head-to-head" overall-to-overall docking model.
This means the national-level government big-data platform builds direct, high-level connections with these bodies to exchange data securely and efficiently, which improves sharing, coordination, and decision support across the whole system.

City perception focuses on real-time sensing of running status via IoT and sensors. Typical scenes are intelligent connected transport(A) andurban lifeline monitoring(water, power, gas, etc.) (C). OA and project approval (B, D) are process/office systems rather than direct sensing scenarios.

Typical city AI usage includesspeech recognitionfor internal systems,intelligent service Q&A,CV-based road-damage detection, andCV-based compliance detection (e.g., masks) in food-safety inspections.

The four dimensions areone screen to view all,one network for monitoring & early warning,integrated linked command, andone-click analysis & decision. "One network to manage everything" overlaps conceptually and is not a separate defined dimension here.