A FIFTH man believed to be involved in the kidnapping of Hong Kong's property billionaire Wang Teh-huei was last night extradited from Britain to stand trial in Hong Kong. Two officers from the Organised Crime and Triad Bureau flew to Britain to escort back Li Wai-kit, a 35-year-old decorator. Li was taken into the Airport Police Station at Kai Tak and then on to bureau headquarters in Causeway Bay. Police said Li had been charged with kidnapping and will appear in Eastern Court today. Li was arrested in the town of Deal, near Dover, in southern England in September 1990. Wang, chairman of the Chinachem Group, was kidnapped on April 10, 1990, as he left the Royal Hong Kong Jockey Club. Despite police advice, his wife and co-director of Chinachem, Nina, paid half of the US$60 million (about HK$465 million) ransom but Wang has not been seen since. He was reputedly the 13th wealthiest man in the territory with a fortune estimated at $7.5 billion.