"Russia is worried by China's quiet expansion in Central Asia," said Fyodor Lukyanov, editor of Russia in Global Affairs magazine. "Moscow has grown accustomed to viewing Central Asia as its backyard, but China doesn't share this view."

What's the meaning of "viewing Central Asia as its backyard"?

Thanks in advance!
Kind of like, belonging to Russia, although not literally
New2grammarviewing Central Asia as its backyard

Here is how I'd read it: not exactly your house, but something you own, or you control, or where you can do whatever you wish.