The secretive communist government of Laos, a country with a population of less than 7 million, rarely causes a ripple on the diplomatic circuit. And yet its sleepy capital will spring to life this week when global leaders arrive for an Asian summit.

Barack Obama will be among them, making the last push of his presidency to "rebalance" Washington's foreign policy toward Asia, a strategy widely seen as a response to China's economic and military muscle-flexing across the region.

The might of Laos' giant neighbor to the north is hard to miss in Vientiane: wealthy Chinese driving SUVs overtake tuk-tuks sputtering along the roads and Chinese-backed hotels sprout from noisy construction sites in one of Asia's most low-rise cities.