Chinese tycoon Guo Guangchang has made a public appearance during his company's annual meeting after reportedly being detained by the police over the weekend.

Guo was first reported missing on Friday last week, according to the BBC. Fosun International, one of China's most prominent asset management firms, later revealed that Guo, who is the chairman of the company, was assisting authorities with an investigation. According to Fosun president Wang Qunbin, the investigation was mostly about personal matters relating to Guo.

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No further details about the investigation were released as it is confidential.

Caixin reported early Monday morning that Guo had been released by the police. One of the attendees of Fosun's annual meeting told Reuters that Guo received a standing ovation during his recent public appearance.

The disappearance of Guo comes after a series of senior executives have temporarily disappeared this year as Beijing conducts a massive investigation into the financial sector.

Earlier this month, some top executives of China's biggest brokerage firm Citic Securities were reported missing. Just like Guo, it turned out that they had been asked by the authorities to help in an investigation.

Guo, who is described as"China's Warren Buffet", has business interests in various sectors including the media, insurance, real estate and retail. Fosun Group recently sealed a deal worth $1 billion to gain control over Club Med, a French holiday group.

The parent company - Fosun International -  of the Shanghai-based Fosun Group is listed on the Hong Kong stock exchange. Trade in Fosun shares were suspended on Friday following the chairman's disappearance. The company's shares fell more than 10 percent as it resumed trading on Monday. The same loss affected Fosun Pharmaceutical, which is also listed on the Hong Kong stock exchange.

TagsGuo Guangchang disappearance, Guo Guangchang makes public appearance, China's Warren Buffet, Fosun Group, Fosun International, Fosun Pharmaceutical, Citic Securities