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Good ledger — and the line item that rarely gets priced in is the power bill. Alibaba's 20 GW cloud target is the number to sit with: at data-center scale, 20 GW is roughly twenty-plus large hyperscale campuses, and the power has to be firm, not just contracted. That's why the buildout is drifting toward where the energy is — Inner Mongolia's wind and solar hubs, with storage doing the firming — rather than where the users are. SMIC's side of the bill is similar: fabs are among the most power-hungry industrial loads, and the 34% minority share shows how much of the economics now sits in the financing structure, not the wafer. The question 'who pays' will increasingly be answered in megawatt-hours, not just yuan. We track the Chinese suppliers building the power side of this stack — inverters, storage, switchgear — from the factory floor up.

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