Lee Sin needs to make his mark quite early in the game to be completely effective, so these AD-heavy runes help him do massive amounts of damage in early level 2, 3, 4 ganks, etc, without having to rush a damage item, thanks to Lee's natural early-game AD strength and ability scaling. Shake opts often for a Locket of the Iron Solari right off the bat after his Wriggle's/boots1, since he's got that built-in early-game damage. The HP, armor and active shield goes great with his kit for balls-deep ganks and tower dives.
The 9/21/0 masteries are obviously because he's building almost exclusively tanky after the Wriggles, to be an unkillable, annoying pest in the late-game: his max'd E is a huge slow, proper ultimates can really change a team fight, and between his W and item builds, he can be great utility.
Check his match history, as he's been playing nothing but Lee Sin right now.
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Thank you very much. i also checked his guides and montages pretty impressive