Wang Sicong poses with a fan at the charity event in Beijing. Feb 14. [Photo/CFP]

The online spat has quickly become one of the most-discussed issues on Weibo, one of China's most popular social-networking sites, where Wang has more than 10 million followers.

A web user commented: "He raised more than one million yuan in donations, and the commentary said nothing about that?"

Another said: "Will media one day offer suggestions that provincial officials can only marry women with an A cup?" It received 2,289 likes.

"Only rich people make news by saying this online. Ordinary people can do this a million times without being labeled 'being vulgar'."

"Dear husband, you like buxom women or not? Give me your true words, I'll decide whether to have a boob job or not, " a Weibo user commented while jokingly positioning herself as one of the women wishing to marry him.

Wang is seen by many as the country's most eligible bachelor and has earned the online nickname "national husband".

Wang has a history of being a blabbermouth. In 2011, he criticized millionaire Zhang Lan for claiming to be on good terms with his father and that his father had provided for free the venue of her son's wedding.

He said on Weibo: "How can you say you have great relations with my dad since you've never met him?"

In June last year he hit out at Jingdong.com, one of China's largest online marketplaces for a delay in sending four computer desks, each worth 200 yuan.

Last December he blasted movie Gone With The Bullets on Weibo, and had online spats with its producers.

Chinese authorities have urged the entertainment industry to spread "positive energy" and remove obscene and other improper elements.

The director of the forthcoming Lunar New Year's Eve gala, China Central Television's most watched show of the year, also vowed not to invite any blacklisted celebrities that were embroiled in scandals involving sex, drugs and gambling.