The crime of obstructing public affairs refers to acts of violent or threatening to prevent staff members of state organs from performing their duties in accordance with the law, deputies of the People's Congress from performing their duties in accordance with law, obstructing Red Cross staff members from performing their duties in accordance with the law, or deliberately obstructing the execution of national security organs by law National security work tasks, no violence, threat methods, behaviors with serious consequences. Which of the following features is a crime against public service? ['Lee asked his son on duty at the police station to go home for Chinese New Year.', "Xiao Liu resolutely disagrees with her husband's work on holiday because her husband is busy working in the Public Security Bureau.", 'The leader of a factory gathers a large number of employees to obstruct the tax personnel to check the tax.', 'Old Zhang of the police station runs through the town on weekdays, once he was beaten by the masses while acting nonsense.']