It was at precisely the moment Xiao Zhang was supposed to be mulling over his options and trying to find an escape from his predicament, that his mind somehow veered back to Einstein's theory of General Relativity and the conceptual experiment of the accelerating elevator. Because if gravity was the same thing as constant acceleration, then what exactly was five minutes anyway? Wasn't time relative? And if it was, then how could it ever come to an end? The thought seemed oddly comforting.Learning Chinese? Rather than assault you with more , today we're pleased to present a simpler lesson intended to help you practice all the Chinese you need to deal with time, whether it involves procrastinating at work or hectoring the overattentive wait staff at your favorite Chinese restaurant. We hope you enjoy it, and if you have suggestions on future topics you'd like to hear covered, let us know anytime at email@example.com.