Many dissidents and activists have fled Beijing after a crackdown to deter any interruptions to the 60th anniversary celebrations of communist rule. While many Beijing residents are expected to spend the longest-ever 'golden week' National Day holiday - eight days - travelling, the dissidents said they were leaving the city to take a break from suppressive surveillance. Dissidents said police began to step up scrutiny on September 15 as officers were sent to trail them around the clock. Unlike previous sensitive dates, such as the anniversary of the Tiananmen Square crackdown and last year's Olympic Games, when some dissidents and activists were placed under house arrest or taken to hotels on the city's outskirts, this time many of them said they were not staying in Beijing. Some were contacted by police and told not to stay in the city during the holiday. Liu Di, also known by the internet name Stainless Steel Mouse, said she had left Beijing for Jiangsu with friends, including Liu Xia, wife of prominent dissident Liu Xiaobo, after being told by the police to stay away from the city. 'Some police officers have checked in to the hotel room next door,' she said. 'They follow us wherever we go, but we are allowed to go out.' Liu Xiaobo, a co-drafter of political manifesto Charter 08, was arrested this year on charges of inciting subversion, prompting an international outcry for his release. Activist Zeng Jinyan, wife of Nobel Peace Prize nominee Hu Jia, said she had left Beijing and would stay in Fujian until after the holiday. Zeng would not say if she had been forced to leave Beijing, but said that there would be 'a lot of hassles' if she stayed. 'I chose to stay in Beijing on June 4 this year, and it was terrible,' Zeng said. 'I couldn't go anywhere.' Authorities rolled out tight security controls on dissidents for this year's 20th anniversary of the bloody crackdown in Tiananmen, the scene of today's military parade. Chen Ziming, who was labelled a 'black hand' of the Tiananmen movement, said the police were 'very delighted' when he told them he and his family would be going away. Having participated in the National Day parade twice when he was young, Chen said this year's drum-tight security was a sign of the government's lack of confidence. 'This year's activities don't look like a celebration,' he said. 'Everybody is very nervous. When I participated in the parades 20 and 30 years ago, there weren't too many rehearsals and ordinary people were allowed to gather along Changan Avenue to watch the parade.' Only a select few will be able to watch the parade along the avenue, while the rest of the nation will have to watch it on television. Stretches of the avenue are off-limits to the public, and people on parade routes have been told to not even look out of windows. Zhang Xianling , a core member of the Tiananmen Mothers group, is among the few who insisted on staying in Beijing. She said police officers had been stationed outside her home around the clock since September 15. Zhang said she could go out of her home but a couple of officers would follow her. 'The so-called celebration is just a lie,' she said.