Hong Kong police yesterday gave the go-ahead for a mass protest against the national security bill and the government on July 1, but organisers complained that requirements for the event were too harsh and said they would appeal. The approval came as a motion calling on people to attend the protest, to be moved by unionist legislator Lee Cheuk-yan next Wednesday, was also approved by Legco President Rita Fan Hsu Lai-tai. Police on Tuesday issued a letter of no objection for the march, from Victoria Park to the Central Government Offices, but said protesters should leave the government headquarters by 7pm. The march is being organised by the Civil Human Rights Front. Legislator Lee Cheuk-yan, one of the organisers of the march, yesterday criticised the requirement. He said the march would probably last from 3pm to 8pm as the expected turnout was 100,000. The number of participants was listed at between 10,000 and 50,000 in the application. 'In past protests, even if there was a deadline, police would make a compromise with the organisers. Why have they rejected our request that it should finish at 8pm?' Mr Lee said. He said the government's administration wing, which manages the government offices and made the decision, was being 'stupid'. Mr Lee said the police had said they thought the 7pm deadline would not be viable, but their efforts to extend it were rejected by the administration wing. 'I am prepared to stay until after 8pm if 100,000 turn up. We could stay until midnight if more turn up. 'I would be more than happy to undertake civil disobedience and police could just arrest me for breaching the requirement,' he said. He has already written to the Director for Administration, Andrew Wong Ho-yuen, to complain and seek an explanation. A police spokesman said the administration wing normally allowed protests to be held before the government headquarters closed at 6.30pm. 'In light of the expected turnout, the government has already extended the time to 7pm.' He said police would be flexible when dealing with the protesters, and officers would co-ordinate with protest organisers. A spokeswoman for the administration wing said: 'We will monitor the situation and liaise with the police and organisers closely to ensure that the public activity on the day will be handled in a pragmatic manner.'