Laid-off workers refer to those who have left their production and work positions and are no longer engaged in other work in the unit due to the production and operating conditions of the enterprise, but still retain labor relations with the employer. According to the above division, which of the following can be called as laid-off workers among the people described in the following options? ['Fang Wei originally worked in a pastry food factory, quit his job six months ago, and opened a car repair shop.', 'Du Xiaojuan was originally an office secretary of a consulting company. Recently, the company cancelled her work contract because of operating difficulties. She only had to do housework at home.', 'Li Dongsheng originally worked in a machine tool factory and was unable to work due to long-term illness.', 'Shen Sheng originally worked in a car manufacturing plant. He is 53 years old. Last year, the factory was overstocked with products, and there was a surplus of staff, so that people over 50 years old would go home to rest and wait until 55 years old before going through formal retirement procedures.']