In 2009, a new microlithic site in the Yeniugou Valley, in the vicinity of the entrance to the northern Qingzang Plateau in the Kunlun Mountains of Qinghai Province, was discovered by archaeologists. The site is as high as 3800 m a.s.l, and has many stone artifacts and two well preserved hearths. Three AMS14C dates, determined from ember taken from the hearths, show that the site was formed as early as 7500 a BP. This is not only the certain date for this site but also a reliable reference for the microlithic sites without strata or confirmed dates throughout the Qingzang Plateau. Both the expediency of the assembly of stone artifacts and provisionality of the hearths indicate that the site was used as a temporary camp by early foragers in the megathermal of the Holocene epoch.