LONDON -- Yuen Chung Biu and Wai Chi Leung pleaded not guilty to charges of spying for Hong Kong's intelligence service and of foreign interference at Central Criminal Court in London on Thursday.
Yuen, 64, and Wai, 39, appeared at the court also known as the Old Bailey to face charges under the U.K.'s National Security Act, which came into force in December last year. Their trial is set to commence in March.





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