郑也夫：政改难产之因

https://www.youtube.com/watch?v=7f-kJdWq4a8

https://chinadigitaltimes.net/chinese/2019/01/%E9%83%91%E4%B9%9F%E5%A4%AB%EF%BC%9A%E6%94%BF%E6%94%B9%E9%9A%BE%E4%BA%A7%E4%B9%8B%E5%9B%A0/

https://www.youtube.com/watch?v=CdeJN6TPqfc