China has established mostly domestic data exchanges as it seeks to bolster the digital economy. A recent partnership is putting its regional ambitions into focus, even as the nascent sector faces questions over ownership, valuation and governance. SHENZHEN: A smart cleaning robot trained to navigate an office building in Shenzhen may work flawlessly. But place the same machine in a shopping mall in Kuala Lumpur, and it could struggle with unfamiliar layouts and consumer behaviour. The