What's driving China's resilient Q1 economic performance?

China's GDP grew 5.4 percent in the first quarter. An official from the National Bureau of Statistics said high U.S. tariffs may exert some pressure on China's foreign trade, but will not change the long-term positive trend of the Chinese economy. What has been driving China’s economic growth, despite the external pressures? Is it sustainable? The 5th China International Consumer Products Expo in Hainan showcases cutting edge technologies.