Ten lessons for an ageing world 100 designs for a modern world Extra time：Ten lessons for an ageing world Food systems for an urbanizing world Extra time : ten lessons for an aging world / 30 lessons for living English for a changing world Strategies for a changing world strategies for a changing world 百岁时代：当人生百岁成为常态，我们该如何活得更好？：10 lessons for an ageing world