HONG KONG, May 26 (AFP) - Exiled Chinese dissidents, including Wang Dan and Wei Jingsheng, have been invited to mark the 10th anniversary of the Tiananmen Square massacre at a Macau forum, dissidents said Wednesday. "Some 100 dissidents have been invited to attend the forum," in Macau from June 5 to 6, Frank Lu, head of the Hong Kong-based Information Centre of Human Rights and Democratic Movement in China, told AFP. The forum will also discuss China's "one-country, two systems" policy and how it can be applied in Macau, Hong Kong and Taiwan, he said. "There is high possibility that both Wang and Wei can attend the forum in Macau" if the Portuguese government issue them visas, he said. The Portuguese enclave reverts to Chinese sovereignty on December 20, following in the footsteps of the 1997 handover of Hong Kong to Beijing. Organisers decided to hold the forum in nearby Macau after Hong Kong authorities last month refused to give visas to 11 dissidents, including Wang and Wei, to attend a seminar held here to mark the Tiananmen Square crackdown. The application for the visas had been seen by some as a test of Hong Kong's autonomy and tolerance under Chinese rule. The government has denied there was any pressure from the mainland to refuse entry to the dissidents and said Hong Kong had no blacklist of people for immigration purposes. The Macau forum will follow the annual candle-light vigil organised by the Hong Kong's Alliance in Support of the Patriotic Democratic Movement in China on June 4 in the former British colony. Tens of thousands annually turn out in Hong Kong to mark the night of June 4, 1989 when troops backed by tanks crushed six weeks of pro-democracy protests in Beijing's Tiananmen Square. Hundreds if not thousands are thought to have died, although Beijing has not issued an official toll, labelling the leaders "counter-revolutionaries' who were out to topple the government. Wang, one of the leaders of the 1989 movement, now lives in exile in the United States after being released from jail on medical parole in April 1998 and sent abroad. Wei is a veteran of pro-democracy movements in China who was released in November 1997 on medical parole after spending almost 20 years in Chinese jails. He also now lives in the United States.  