Shenzhen is China’s leading high-tech hub. The once obscure fishing village became a pillar of the global economy thanks to its proximity to Hong Kong and to being designated a Special Economic Zone in the earliest days of Deng’s reforms, plus some other smart choices and good luck. Part and parcel of that economic transformation is that the city has physically transformed from looking like a poor fishing village to looking like a major 21st-century city. The US can’t point to any specific econo...