When China opened up, Chinese income increased and China went from a poor to a middle-income country. In this video, Miajie Yu discusses the impact of trade liberalisation on firm productivity in China. Openness to trade had a big impact on processing trade – such as putting together iPhones – and now accounts for half of Chinese trade. This video was recorded in March 2016 during the Royal Economic Society’s Annual Conference held at the University of Sussex.