Some of the first humans in China came from the Americas?

Based on two kinds DNA evidence there were two migrations connecting both North and South American humans to those in China, during and after the last ice age.
Which way do you imagine they traveled? Both ways? Only one?

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windinhishair · 61-69, M

There was likely some movement in both directions, but the majority was probably from west to east.

Roundandroundwego · 61-69

@windinhishair on what evidence do you favor that direction?

windinhishair · 61-69, M

@Roundandroundwego DNA testing provides strong evidence linking people on both continents. However, knowing that there were no people in North and South America prior to the first migration, they must have gone west to east. Undoubtedly it wasn't linear, and some people may have moved back across at various points in time, particularly during the second migration. Resources were also likely better in North America, since they had yet to be exploited by humans. Tool culture shows a progression in Asia and an abrupt appearance of similar tools in North America.