After a long and hot July marked by the near-absence of most of our guests, Sinica host Kaiser Kuo is pleased to be back this week leading a discussion of the recent accident on the high-speed Hangzhou-Wenzhou rail line, an accident that has shattered public confidence in the rail system and undermined one of the most public symbols of China's economic and technical resurgence.

And while we don't want to downplay the human tragedy involved, we do have to ask: why all the fuss? After an abortive attempt to quite literally bury the accident, the state has acquisced to an explosion of public indignation over the accident. The outcry has become particularly visible on microblogging site Sina Weibo, and raises the question of why? Is this a sign of a general loosening of propaganda controls, a greater radicalization of the Chinese middle class, or perhaps even an internal power struggle within the arms of the Community Party. This week we consider the evidence for all these interpretations.

Also up for discussion is the question of what will happen to Sina Weibo? Leading away from the rail accident, we ask if China's answer to Twitter has become too big to censor and wonder about the future for the platform. We also take a look at a controversial article by David Sedaris and ask, has the popular humorist lost his sense of humour, or have we?