Taiwan has tightened restrictions on visits by mainland officials and scholars regarded as 'hardliners'. Li Jiaquan, an adviser to the mainland authorities on Taiwan affairs, said 13 out of 15 mainland scholars and officials for whom Taiwan's private Hsiao Chao Foundation sought visas were rejected. Mr Li was among those turned down. Others on the list included the former deputy head of the mainland's All-China Taiwan People Friendship Association, Guo Pingtan, former head of the Taiwan Research Institute in Xiamen, Chen Kongli, and Professor Li Ren of the Aviation University. Mr Li criticised the move, which he said indicated that Taiwan President Lee Teng-hui was not sincerely committed to promoting cross-strait relations. 'The Hsiao Chao Foundation is a non-official Taiwan organisation aimed at promoting unification,' Mr Li said. 'The seminar we planned to attend in Taiwan is on promoting unification. This shows Taiwan authorities are using excuses to discourage academic discussions on cross-strait relations.' The new guidelines, though not spelt out, targeted what Taipei called hardliners. Taiwan sources said some mainlanders had been uttering 'provocative' words on the island. The report came days after Beijing rejected a request from Taiwan's Straits Exchange Foundation that one of its officials accompany the families of six Taiwan tourists killed on Saturday in Gansu province. The families went to bring home the bodies. The foundation was also embarrassed last month when Beijing rejected an identical request following the murder of Taiwan city councillor Lin Ti-chuan on the mainland.