Taiwan yesterday walked out of the Apec summit, with the island's President Chen Shui-bian accusing China of suppressing its right to attend international meetings. Mr Chen said Beijing had 'violated the duties and obligations of a host country' in refusing to allow his nomination for the Leaders' Summit - former vice-president Li Yuan-zu - to attend. Beijing said Mr Li did not satisfy Apec protocols. The chief spokesman for the Taiwan delegation in Shanghai, Yang Wei-li, said it would quit the forum 'as soon as possible'. Chinese Foreign Ministry spokesman Zhu Bangzao regretted Taipei's move, saying: 'We've provided equal treatment, protocol and facilities to all members.' Mr Zhu said an invitation had been issued to Taiwan. However, it was not addressed to Mr Li. President Chen warned that the incident could have a 'negative impact' on cross-strait relations.