Those insane Russian friends are back again this time taking on China's Shenzhen Tower, that even under construction is a whopping 660m making it the second biggest in the world.

The video shows the logistics behind the climb which had us clenching our butt holes from around the one minute before the fearless bro's freely scale the gigantic structure.

Better still is a beat from the rather unknown glitch producer Gandzhu who's original "Your Motivation" soundtracks the risky and outright scary climb.

Wonder what they were listening to on the way up?

Check out the story behind their climb here.

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