A visit to Taiwan next month by a top Chinese negotiator is likely to be delayed due mainly to a tight schedule that month for exchange visits across the Taiwan Strait, the Taipei-based Straits Exchange Foundation (SEF) said Wednesday. Taiwan and China agreed during negotiations in Chongqing in late June that Chen Yunlin, president of the Beijing-based Association for Relations Across the Taiwan Straits (ARATS) , will lead a business delegation on a visit to Taiwan on Sept. 5. However, while there have been no changes in Taiwan's plans for Chen to visit, it is not yet known whether the trip will take place before the end of the year, the SEF said. SEF Vice Chairman Kao Koong-lian is currently in eastern China to meet with Taiwanese businesspeople operating there. After he returns to Taiwan, SEF Chairman Chiang Pin- kung will travel to China Sept. 16 to visit Taiwanese enterprises in Shanghai and Kunshan in Jiangsu Province, the SEF said. On the Chinese side, Minister of Culture, Cai Wu is expected in Taipei soon, while Acting Shannxi Governor Zhao Zhenyong is scheduled to visit on Sept. 16 and two Chinese delegations concerned with intellectual property rights and judicial affairs will visit late next month, the SEF said. The SEF and ARATS are semi-official bodies authorized by their respective governments to handle cross-strait exchanges in the absence of formal contact between Taiwan and China. Chen's last visit to Taiwan was in December 2009 for the fourth round of SEF- ARATS talks in the central city of Taichung. Meanwhile, Kao said in Hangzhou earlier Wednesday that the SEF and ARATS will exchange instruments on the cross-strait economic cooperation framework agreement by the middle of next month. The pact was signed on June 29. 