There is an old Estonian saying 'Eesti Piir Käib Vastu Hiina Müüri'. It literally translates as 'Estonia's border goes against the Chinese wall' or in other words, the Estonian border should go all the way to the Great Wall of China. This was a patriotic song sung by Estonian soldiers during Soviet times. I can see how it was popular at the time.
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There is another video of this song but the English translation is not as good as the one above. The images are much better however.