Our piece last week comparing US and Chinese capex costs over eight power project types found that for onshore wind, solar and battery energy storage, China’s cost advantage is a relatively unremarkable 2:1 to 3:1 ratio. But if you extend the comparison to HVDC transmission lines, offshore wind, or compressed-air – projects involving a lot more heavy machinery and excavation – then the capex ratio is more like 4:1. For nuclear, if you take the reported capex costs of below $2.5 billion per GW at face value, the cost ratio is an exceptional 7:1, demonstrating that the more concrete involved, and the longer the lead times (to put it crudely) the bigger China’s advantage – or conversely, the more the…