I remember the first time I saw someone flying a double stringed kite.  I was in awe at about 12 years old.  We were on family vacation on the east coast of Canada.  I bugged my dad for months to get me one.  Santa prevailed at Christmas.  Then I never used it.  I still have it 22 years later in the package unopened.  lol . Can you believe that.  ><  What a pity.
I should find it and bring to China, they love their kites here.