What do you think is the best invention of the last decade?

I think the best invention of the last decade would be: square dancing! China's big moms have changed your life and mine! Chinese square dance, the crazy development and growth, just a few years red all over the north and south of the Yangtze River, there are great prospects for the world, square dance has changed the lives of many people, the morning, evening, a loudspeaker, a few melodious songs! You can be happy, enjoy dancing! The square, the neighborhood next to the open space, and so on are the land of the big moms, the impact of the big, far-reaching, is you and I can not be measured! No matter what there are two sides, there are good and bad, a lot of big moms live a healthy and regular life! But it also affects the lives of some people, and there have been conflicts! This is square dancing!