Key points in this article
Why it is discussed now
Stock retrofit is timely because policy rhythm, technology readiness and market acceptance have converged. The moment favors careful, patient progress over a rushed push that leaves the old wiring and the new demands poorly matched on the ground at handover.
What patrols should inspect
Daily patrols should inspect equipment state, capacity margin, fault history and the handoff between teams. These are the items that quietly decide whether the retrofit keeps performing or slowly degrades until a failure forces an unplanned, costly stop in service.
The Yantai view and practical notes
We trust the field over the spreadsheet. More site walks and real feedback produce steadier conclusions where local conditions differ by district. Inspection frequency beats form; small daily checks that log and close issues stop minor faults from becoming outages. Field feedback always beats a clean slide shown in a meeting. A written boundary protects both the operator and the paying user. Patience here avoids the costly rework that rushed work later demands. Local conditions, not national averages, should guide the final call.