The town of Sost is gateway to millions in customs duties, with its rickety stalls of corrugated iron engraved in Mandarin and Urdu, its cross-border secret agents and its dusty petrol station's abrupt service.
It is the first stop along a new USD 46 billion "economic corridor" designed by China in Pakistan.
Drivers from China arrive through the Khunjerab Pass, the world's highest paved border crossing at 4,600 metres above sea level, and unload their goods encircled by the magnificent Karakoram mountains, swirled with snow.
But, until recently, the highway was cut off just south of Sost, blocked for five years by a landslide that dammed the Hunza river and birthed the 10 kilometre long lake of Attabad, with its ice-blue glacier water.
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Unable to drive around the mountain, China simply tunnelled through it, sending thousands of workers in a titanic effort that took more than three years and cost at least USD 275 million.
Before the tunnel, residents of Sost had to cross the lake by boat in a journey that took at least an hour. Traffic in winter was meagre.
"With the tunnel, we hope business will take off and tourists flock here," said Ali.
"We are once again connected by road to the rest of Pakistan," rejoiced another resident, Mohammed Israr.
"The Chinese care only for their own economic interest," said Noor-e-din, another trader with a russet moustache. "We risk spending our days counting trucks as they drive past.