The article looks at how China is trying to make electricity generation more efficient by creating a new spot market for electricity. By studying how Guangdong province's spot market works, the researchers found that when demand for electricity is high, prices can change a lot. They also found that setting a minimum price for electricity can benefit producers at the expense of consumers. Additionally, there is evidence that some areas in Guangdong have too much control over electricity prices, so more power lines are needed to balance things out.