About the Reviewer

Guangwei Feng is a mobile developer at Douban (https://www.douban.com/) in Beijing. He holds a master's in information technology from University of Sydney and a BE from Nankai University (Tianjin). He is a part of the Douban app (social), Douban Dongxi app (online shopping), and TWS for Douban FM (wearable) projects. Out of these, the Douban app has been downloaded over 10 million times and has become one of the most popular apps in China.