上海帮 (Shanghai Gang or Shanghai Clique / Shànghǎi bāng) is a nickname given to a group of high-level CCP politicians who were most prominent during the 1990s and early-2000s. These politicians usually had strong ties to then-president Jiang Zemin, who came to power as the mayor and party chief in Shanghai. Jiang packed the Politburo with his former subordinates, but since his leaving office in 2003, the Shanghai Gang’s influence has arguably waned.
Why it is blocked: 上海帮, like “Shanghai Gang” in English, has a decidedly pejorative connotation, implying underhanded dealings and cronyism. Peter McGregor’s The Party has a fantastic chapter on how the central government was able to rein in the group’s power by arresting and imprisoning one of Jiang’s most trusted allies, Chen Liangyu, on corruption charges. As the Communist Party essentially runs China, it can be helpful to think of groups like the Shanghai Gang and the Youth League faction (团派 / tuánpài—also blocked on Weibo) as China’s de facto form of political parties. These alliances are often based on personal connections as well as ideology. For a government which likes to present itself as unified on all fronts, writing about such political in-fighting is no doubt frowned upon. [Status]