China would not accept Taiwan's nomination
Taiwan has said it is pulling out of this weekend's Apec meeting of Asia-Pacific economic leaders in Shanghai after a row with China over who should represent Taiwan.
Taiwanese officials accused China of irrational behaviour and unfairness in its refusal to issue a formal invitation to the island's former vice-president, Li Yuan-zu.
He was nominated by the Taiwanese government to represent the island at the leaders' meeting, but Beijing, which does not recognise Taiwan as a nation in its own right, appears to have seen him as too politically sensitive.
China made it clear that it believed Taiwan should follow the example of previous Apec meetings at which it has been represented by non-politicians or lower-level ministers in charge of economic affairs.
China is also thought to have been angered by the fact that Taiwan's President, Chen Shui-bian, originally suggested that he himself should attend the meeting. Beijing is deeply suspicious of Mr Chen, who it regards as a supporter of Taiwanese independence.
Taiwan reaction
The current row may reflect China's desire to teach him a lesson for breaching what it sees as Apec protocol.
Taiwan's economics minister has been present at an Apec ministers' meeting in Shanghai this week, but he was very publicly over-ruled by China's foreign minister, Tang Jiaxuan, at a news conference on Thursday.
When the Taiwanese official tried to express his opinions on who should represent the island, Mr Tang abruptly cut him off, saying he did not want to waste time talking about the issue.
President Chen, speaking in Taipei, made it clear that he believed the unprecedented row could damage cross-Straits relations. He said China's behaviour had hurt the feelings of the island's people and Taiwan could not allow its dignity to be trampled on.