If, in your life, you have a chance to see in person Yo Yo Ma's Silk Road Project Ensemble, do so. And do whatever it takes to get tickets close enough that you can see the musicians interact, smiling and nodding and keeping an eagle eye on each other as they keep time on amazingly fast and intricate pieces with no conductor. This is instant reaction after three of the most memorable hours I have spent at a live event, in our waning days in Shanghai.

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