China's President Xi Jinping has told artists not to chase popularity with "vulgar" works but promote socialism instead, with state media on Thursday comparing his remarks to a speech by Mao Zedong.

Beijing imposes tight controls over art and culture, which critics say hampers China's efforts to upgrade its economy from lower-end manufacturing towards more profitable creative sectors.

In a high-minded broadside against market forces, Xi told a group of artists on Wednesday that they should not become "slaves to the market", the official Xinhua news agency reported.

"Pure sensual entertainment does not equate to spiritual elation," Xinhua cited Xi as saying, adding: "Popularity should not necessitate vulgarity."

Xi described common citizens as "the connoisseurs and critics" of art, added the agency, which paraphrased him as saying: "Serving the people and the socialist cause is a requirement of the Communist Party of China, and it is essential to the future development of the country's cultural and artistic sectors."

China relaxed some cultural controls from the 1970s, when popular art consisted of little more than propaganda, in accordance with the doctrines of the country's first Communist leader Mao Zedong.

The state-run China Daily on Thursday likened Xi's remarks to a well-known speech by Mao in the 1940s which outlined his view that the arts should serve politics.

"Art and culture cannot develop without political guidance," the paper said, congratulating Xi for "emphasising the integration of ideology and artistic values."

Beijing is keen to increase exports of cultural products, a process analysts say will be difficult without lightening the heavy weight of state censorship.

The Communist Party continues to censor artists who it perceives as challenging its right to rule, such as Ai Weiwei, and ideological restrictions have tightened under Xi.

Xinhua also weighed in on the debate on Thursday, drawing the comparison with Mao's discourse in a commentary and lamenting that "there are plenty of vulgar, repetitive and fast-food art works".

China's literature and artworks are "less impressive" than its "notable increase of economy and state power", it said, adding: "This weakness goes against China's ambition in realising the national revival and sharpening its global image.

"Not a single Chinese pop song has gained as much international popularity as 'Gangnam Style'."

Military singer resurfaces married to China president's brother
Beijing (AFP) Oct 16, 2014 - A Chinese army singer who mysteriously disappeared from public view six years ago has made a surprising reappearance in local media -- as the wife of the President Xi Jinping's brother.

In a rare glimpse into the life of the Xi family, a newspaper in the southern city of Shenzhen quoted the Communist leader's younger brother Xi Yuanping describing his marriage to singer Zhang Lanlan.

Zhang was a mainstay on glitzy Chinese TV shows for years, but reportedly made no further appearances after singing in China's annual official new year gala in 2008.

The report, which was quickly deleted from Chinese websites, quoted Xi Yuanping, 58, as saying that he had married the 34-year old Zhang -- nicknamed the "military's top beautiful woman" -- the same year.

"Lanlan is a simple and sincere woman," the report -- which showed the two seated together -- quoted Xi as saying.

Xi Jinping similarly married military singer Peng Liyuan, who was herself for many years a mainstay of the new year gala -- the most watched television show in the world.

China's leaders are highly secretive and tightly restrict any reports about their private lives in local media.

Since her disappearance, Zhang, who also acted in several TV dramas as one of tens of thousands of entertainers who are also members of China's People's Liberation Army (PLA), has been subject to lurid rumours, some involving other senior Communists.

The PLA has since its inception maintained its own entertainment troupes, who sometimes become wives and mistresses for officials of the ruling party -- former President Jiang Zemin has long been rumoured to have conducted an affair with PLA entertainer Song Zuying.

Former deputy navy commander Wang Shouye spent 12 million yuan on five mistresses, all of whom were army performers, before being handed a suspended death penalty in 2006, state-run media reported.

Xi's relatives have amassed hundreds of millions of dollars in assets, the US news agency Bloomberg reported in 2012, angering the Chinese government which blocked the agency's website.