How did Uber get 17.7% of Didi (88% of Uber China shares) if they didn't own more than 50% of Uber China to begin with? Also, it was reported that Uber got 17%

How did Uber get 17.7% of Didi (88% of Uber China shares) if they didn't own more than 50% of Uber China to begin with? Also, it was reported that Uber got 17% of economic interest, but only 5.89% of full equity? I assume the rest of the 17% was non-voting shares?