 In a paper published in 2011 by a group of Chinese researchers affiliated with Fudan University, it has been suggested that China is the origin of the expansion of haplogroup O-M268, the parent haplogroup of O-F2320.Haplogroup O-K18 is distributed widely in Asia, from southern India to the Altai Mountains and Central Asia in the west, and from Indonesia to northern China and Japan in the east.According to its distribution, O-K18 can be roughly divided into north subclade O-PAGE59 and south subclade O-PK4.