Hu Shili, Caixin's chief editor, reportedly has a good relationship with Wang Qishan, Xi Jinping's purgemeister general. So we can take this from the top:
While Zhou Yongkang and his relatives were rising to power in the 1990s, the family's ancestral burial ground became a common place for solemn visits by a variety of government officials...
...The stream of visitors seeking to pay respects – and hoping for favors or a career boost – strengthened as Zhou's political career rose. Long lines formed every Tomb Sweeping Day, an annual holiday for remembering ancestors. So many people visited that the local government opened a parking lot outside the village in 2009.
Most visitors were party and government officials. They came from not only nearby Wuxi, but from other Jiangsu cities and Shanghai as well. Some cadres were members of the People's Armed Police. Before leaving, most would ask a Zhou family member to "give a word to senior officer Zhou" on their behalf.
Well, China is an opaque place and more generally the precise power centre of the business/politics/crime nexus constantly shifts, so it's almost reassuring to see something so suggestively Sicilian.