Cai also frequently accompanies Xi during domestic inspections and overseas visits, reflecting what observers see as a high level of political trust. Former China analyst at the Central Intelligence Agency (CIA), Jonathan Czin told The Economist: “Whenever people ask me, ‘What happens if Xi were to drop dead tomorrow and there was no succession plan, who would get the top job?’, Cai Qi seems like the obvious answer.” Czin added that Cai’s role in the CCP “gives him access not just to the party’s sensitive documents, but also to the security services and potentially the military as well.”

While succession politics inside the CCP remain highly opaque, the comment drew attention overseas because it highlighted how closely Cai has become associated with Xi’s inner circle.

From tech-savvy official to hardline loyalist

U.S.-based political commentator Cai Shenkun argued in a May 1 post on X that Cai Qi once projected a very different public image during the Hu Jintao and Wen Jiabao era. While serving as a Zhejiang provincial official, Cai became one of the first senior Chinese officials to actively use Weibo, where he openly discussed technology, media, and public affairs.

Chinese-language profiles of Cai’s former Weibo activity describe him as openly discussing his media and technology habits online, including reading publications such as The Wall Street Journal and communicating through platforms like Skype and Gtalk.

He also publicly addressed issues such as environmental pollution, government transparency, and the 2011 Wenzhou high-speed rail crash, at times adopting a more open style than many of his contemporaries within the party system. Analysts say Cai’s political image shifted noticeably after Xi Jinping consolidated power within the CCP.

A hardline turn in Beijing

Cai’s tenure as Beijing party secretary drew particular attention following a controversial 2017 campaign targeting migrant housing after a deadly fire in Beijing’s Daxing District. Authorities launched widespread demolitions and evictions in the aftermath, displacing large numbers of migrant workers during harsh winter conditions.

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During a work meeting that year, Cai delivered a speech emphasizing aggressive enforcement measures: “At the grassroots level, we must engage in real combat, bayonets drawn, dare to confront head-on, and solve problems.” Critics viewed the campaign as emblematic of a broader shift toward stricter social control and political discipline under Xi Jinping.

Observers also note that Cai’s rise also reflects Xi’s increasing reliance on a small circle of trusted officials who oversee sensitive areas including ideology, security, propaganda, and party discipline.

Power built on loyalty

In addition to his administrative responsibilities, Cai plays a leading role in promoting “Xi Jinping Thought” throughout the party apparatus and is also involved in national security and propaganda-related work aimed at shaping public perception.

Political analysts have compared his influence to that of powerful aides who operated close to previous Chinese leaders, though today’s political structure is widely seen as far more centralized than in earlier decades.

At the same time, analysts caution that proximity to power inside the CCP can be unpredictable. Chinese political history contains numerous examples of senior officials who rose rapidly through loyalty and influence, only to later fall out of favor as political dynamics shifted behind closed doors.

For now, however, Cai Qi remains one of the most influential, and closely watched, figures in Xi Jinping’s political orbit.