The study looked at how e-commerce affects the productivity of China's service industry. By analyzing data from Alibaba and using a method called DEA, the researchers found that e-commerce helps improve technical efficiency in the industry. This means that the industry is able to produce more with the same resources, leading to a high growth rate in productivity. The study shows that technical progress, driven by e-commerce, is the main factor behind the growth of productivity in China's service industry.