More on Hu Jintao
You've all seen the video of Hu Jintao being forcibly removed from the 20th CCP Congress just before voting on the new appointments to the Politburo Standing Committee. If you've not seen it, here it is, available everywhere in the world but in China - https://www.youtube.com/watch?v=TFaG3EpFM8A
You'll see the papers have already been taken away from in front of Hu. You'll see Hu is forcibly removed from his seat and he tries to see the papers in front of Xi Jinping, but Xi pulls them away.
It appears that Hu had a deal with Xi Jinping to promote his son Hu Jaifeng to the Central Committee. Hu Jiafeng is now the party leader in Lishui in Zhejiang Province. The deal was to let Xi have his way with the appointments to the PSC if Hu Jaifeng was also promoted. This did not happen.