As a reminder, Russian gas was also “damn cheap” for a while, and then it got very expensive. That’s the cost of relying on a single supplier and in case of China they now control 80% of the whole supply chain (!) - that is, even if you open PV factory in EU you still depend on China for the resources to make them. China achieved this very low cost by a number of factors - slave labour, low environmental protection, cheap electricity from coal and state subsidies, which declaratively seem to be at odds with EU values, yet nobody has a problem with that and nobody wonders how come they’re so cheap.