Chinese company Fosun, which also has a 20% stake in Spanish wine and ham firm Osborne, has re-started stock exchange trading after a brief suspension following news that its chairman had 'disappeared' and was understood to be involved in a police investigation.

Chinese and international media reported on Friday 11 December that billionaire Guo Guangchang, chairman of Fosun group, had gone missing.

Fosun’s shares were suspended from trading on the Hong Kong stock exchange on Friday morning, amid speculation that Guo was subject to an investigation by anti-corruption officials.

Fosun is one of China’s largest private conglomerates. It entered the wine industry in 2014 by acquiring a 20% stake in Spain’s Osborne group, a wine and premium ham producer.

Xinhua, China’s state-owned media outlet, reported, ‘The trading suspension comes after the news broke on Thursday afternoon that Guo had gone AWOL. Many linked his disappearance to an investigation by the authorities.’

On Friday night, Fosun issued an update, saying that trading in its shares will resume on Monday 14 December. Trading re-started as planned, with the company’s share price down by nearly 10% by the end of the day.

Fosun did not confirm Guo’s precise whereabouts on Friday, but it said, ‘The company understands that Mr Guo is currently helping the Chinese (mainland) police department with an investigation.

‘In an appropriate manner, he will still take part in the discussions of the major issues of the company. The board thinks that the move did not bring significant negative influence to the finance and operation of the company.’

There were earlier unconfirmed reports on Chinese social media that Guo was detained by police at a Shanghai airport.

‘This is an internal issue within Fosun,’ said Osborne’s CEO, Julio Lopez Castano, and its business development director, Juan Alegria.

‘It does not affect our operations, which are independent of any internal issue in one of our minority shareholders. Our brands and our operations are solid and are not affected by this circumstance.’

Osborne, which specialises in Rioja and Sherry, has been present in China for six years.

(Additional reporting by Sylvia Wu)

Updated 17:15 on 11/12/2015 to include a statement from Fosun.

Updated on 14/12/2015 after Fosun re-started trading as planned.