Trading has been suspended in the Hong Kong shares of one of China's biggest private investment conglomerates Fosun International. It comes amid uncertainty over the whereabouts of its chairman, with one report saying Guo Guangchang has been unreachable since noon yesterday. Fosun has interests spanning insurance, real estate and retail. It controls the French holiday group known as Club Med. Guo Guangchang is one of China's wealthiest men. Caixan online cited unnamed sources as Fosun employees had been unable to contact Mr GuoFosun .Fosun International, the parent company of Shanghai-based Fosun Group, was listed in Hong Kong in 2007.