What is "Asian DNA"? I grew up in Siberia, and have some ancestry from local ethnic groups that lived in the region for more than a thousand years, is that what

What is "Asian DNA"? I grew up in Siberia, and have some ancestry from local ethnic groups that lived in the region for more than a thousand years, is that what the authors have in mind? Or should we consider actual DNA differences prevalent in different regions, as seems appropriate when studying genetics? I would think India, China and Siberia would be all a little different from each other genetically?