The highlight of Haroon Mirza’s first solo exhibition in China, “Tones in the Key of Electricity,” is a new work, Copy of 9/11–11/9, 2019, a maximalist four-channel video and sound installation that attempts to encapsulate the maximal insanity of the period we have just lived through and whose consequences we continue to endure: that is, the era stretching from 9/11/2001, the day of the attacks on the World Trade Center, to 11/9/2016, the day Donald Trump was elected president of the United States. The room is partitioned into two, with the four freestanding screens in one space and a circle of