The South China Sea is a marginal sea of the western Pacific Ocean, bounded by southern China, the Indochinese Peninsula, Taiwan and the northwestern Philippines, and parts of Borneo and Sumatra. It covers about 3.5 million square kilometres.

Brunei, Indonesia, Malaysia, the Philippines, China, Taiwan and Vietnam have conflicting claims involving islands, reefs, other maritime features and some boundaries in the region. The disputes are connected to fishing, potential seabed oil and gas resources, and control of important shipping lanes.

The airfield in Laos is relevant to the region’s security because an analysis cited in the news article said it could provide China’s military with alternate routes to disputed areas of the South China Sea. The article presents this as a potential capability, not evidence that the airfield is currently being used for that purpose.