The Singaporean side should take full responsibilities for results from the event, Zhang said.
Lee, neglecting China's repeated solemn representations, insisted on heading for Taiwan for a so-called unofficial visit on July 10.
Zhang said the Taiwan issue is directly related to China's sovereignty and territorial integrity and the Chinese government firmly opposes official relations in any form between countries that have established diplomatic ties with China and the Taiwan authorities.
The Singaporean leader hurts China's core interests, the political base between the two countries and the feeling of 1.3 billion Chinese people, by heading for Taiwan under any excuse, said the spokeswoman. Enditem