Yang, who had also served on the provincial anti-corruption body, became yet another embodiment of the graft seen as rife among Chinese officialdom and which is increasingly being exposed and condemned on China's microblogging services.
New President Xi Jinping has tried to assuage public anger by encouraging frugality among officials and by tightening controls over the bureaucracy and long-cosseted state owned companies.
However, China's ruling Communist Party is extremely wary of private citizens probing corruption, preferring to do the policing on its own terms. In recent months, scores of social media users have been detained after publicizing graft allegations or calling for officials to publicly declare their assets, amid a campaign by authorities to clamp down on 'online rumors.'
Lu Liangbiao, a Beijing-based lawyer, said that under the current climate it would be more difficult to spark an investigation such as the one into Yang.
"If authorities had started their campaign to stamp out rumors online much earlier, then 'Brother Watch' would never have been sent to prison no matter how widely he smiled," Lu posted on his verified account on China's Twitter-like Sina Weibo.