What do China blasts indicate?

One person was killed and eight others injured as series of seven blasts rocked the provincial office of the Communist Party in the northern Chines city of Taiyuan on Wednesday, Nov 6.  It is not the first time that things uncommon took place in China--these are some of them: July 2008--a man sets off explosions on two buses at Kunming (Yunnan province) killing two; June 2009--an unemployed man in Chengdu (Sichuan province) sets a bus on fire killing 28 people including himself; July 2010--an unsuccessful businessman sets an airport shuttle bus on fire in Changsa (Hunan province) killing two people; May 2011--a man sets off explosions outside government offices in Fuzhohou (Jiangxi province) killing three including himself; June 2013--a man kills 47 people including himself on a bus in Xiamen (Fujian province) to 'vent personal grievances'; July 2013--a disabled man sets off an explosion at Beijing's international airport to protest police assault; Cot 2013--a car ploughs into the crowd on Tiananmen Square in Beijing and bursts into flames killing five persons including two tourists.
What do all these incidents indicate? Recent attacks in China have provoked discussion about social and economic inequality (the BBC's Lucy Williamson reports).

Read more:

 http://www.bbc.co.uk/news/world-asia-china-24830724

http://www.bbc.co.uk/news/world-asia-china-24768037

http://timesofindia.indiatimes.com/world/china/7-blasts-near-party-office-in-China-kill-1/articleshow/25348993.cms