The Sanchakou–Yarkant Expressway (), commonly referred to as the S13 Sansha Expressway (), is an expressway that connects the town of in Maralbexi County with Yarkant County. The route is entirely in the Kashgar Prefecture in the Chinese autonomous region of Xinjiang. It opened on November 17, 2014,三莎高速公路试通车 新疆南疆环状高速公路网形成 (Sansha Expressway to open for trial operation; expressway network of Southern Xinjiang takes shape). and parallels much of Xinjiang Provincial Highway 215. In some sources, the expressway is referred to as the Maralbexi–Yarkant Expressway (), or Basha Expressway () for short.上海在新疆沙漠4年建成巴莎高速 (Shanghai builds Basha Expressway in Xinjiang desert in four years).
The expressway connects with the G3012 Turpan–Hotan Expressway at both ends, serving as a bypass of the city centre of Kashgar. It was built with the help of resources from the municipality of Shanghai.
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