Efforts in ultra3D printing expo displays high2.8m cars built across country as sales peakEconomy on stable footing, experts sayAlipayHK accepted for metro in GuangzhouEconomy on stable footing, experts sayStronger support for advanced machine tools urgedForeign automakers buoyed by recovering China mktProposal urges expansion of market for Xinjiang cottonTrade relations between China, Australia shine