Per Tianjin heating regulations and meteorological consultation, city heating systems began commissioning on Nov 7 and will enter official supply at 00:00 on Nov 15. During commissioning, city-wide cogeneration units were started and heating stations conducted hot-fire trials; crews are inspecting and testing heating infrastructure, gradually warming and pressurizing the district heating network, venting residential systems building-by-building and repairing leaks to ensure stable operation.