One of China’s rising political stars and an ally of President Xi Jinping made a rare appearance in the public spotlight yesterday, giving his first work report as Beijing’s mayor. Cai Qi was made the capital’s acting mayor last October and political analysts have made him a front runner to take a post in the Politburo in a government reshuffle in the autumn. He was likely to join the top decision-making body in the role of local Communist Party chief in Beijing, according to observers. Cai, 62, stood out from his colleagues in Beijing with his height and undyed grey hair on the rostrum on Saturday Chinese presidential ally named new acting mayor of Beijing He spent about 90 minutes reading out his work report in a slightly hoarse voice with a heavy Fujian accent. Cai pledged to try his best to cit concentrations of PM2.5 – pollutant particles in smog smaller than 2.5 microns in diameter, which are most harmful to health – by about 18 per cent this year. An annual average target of PM2.5 was set at 60 micrograms per cubic metre by the State Council four years ago, when Beijing’s annual average level of PM2.5 was 89 micrograms. The 2016 annual average was 73 micrograms, so the city is only half way to reaching its target with just one year to go. The acceptable PM2.5 annual average set by the World Health Organisation is 20-25 micrograms. Cai’s appointment in Beijing is his fourth job in four years. He has worked with Xi for more than a decade, first in Fujian and later in Zhejiang province. He was promoted to the National Security Commission three years ago, which was founded and chaired by Xi, and became deputy director of its general office. Beijing’s Communist Party chief Guo Jinlong , has reached retirement age and is expected to step down at the party’s National Congress in Beijing this autumn. The mayor of the capital has always taken the party chief role over the past 20 years and Beijing’s party chief has always been a member of the Politburo. Cai’s job at the national security commission included politics, diplomacy and finance, but his formal title was only confirmed in the shadowy role after he left to become acting mayor in Beijing. In a rare practice, the capital’s former party chief, Liu Qi, was invited to sit in at the meeting. Liu sat beside Cai and was formally introduced by the announcer before Cai delivered his report. Chinese leader Xi Jinping’s trusted Fujian protégés are ones to watch in next party congress, say analysts As Cai returned to his seat after giving his report, Liu reached out his hand for a handshake, before whispering a few comments to Cai about the report as he pointed at the copy in front of him. Cai nodded with a smile and cupped his hands, a Chinese gesture for gratitude and respect. At the end of the meeting the pair kept talking on their way to the exit as Cai put his arm around Liu’s shoulder. Liu, 75, who was considered a protégé of former president Jiang Zemin, came from Jiang’s home province of Jiangsu. He worked in Wuhan in the 1960s, when Jiang had a brief stint in the city. His career started to take off in the 1990s, after Jiang became the country’s top leader. Liu retired in 2012. When speeches of Communist cadres are under strict scrutiny, attending or sitting in at an event is usually seen as a gesture of support in Chinese politics, especially for the someone such as Liu, who played no role in the event.