Why China is starting a new trade war

China is cranking up its massive export machine again, and this time there's nowhere for competitors to hide. A Massachusetts startup called CubicPV bet on silicon wafers, a high-tech component in solar panels. Buoyed by President Biden's climate legislation enacted two years ago, with billions of dollars in tax credits and government loans, CubicPV announced plans in late 2022 for a $1.4 billion wafer plant in Texas. Since then, China has nearly doubled its output of silicon wafers, way more than it needs. The extra wafers had to go somewhere—and they went overseas, pushing prices down by 70%. CubicPV had…