Occupation socialization refers to the process by which individuals choose occupations according to social needs, master the knowledge and skills to engage in a certain occupation, and perform knowledge, skills renewal and retraining after engaging in a certain occupation. According to the above definition, Which of the following are professional socialization:. ['Cafeteria manager Zhang saw that there was an urgent need for translators in many fields. After studying in his spare time and obtaining a translation qualification certificate, he worked for a company.', 'Young Zhang was assigned to a car class after joining the army and learned superb car repair skills. After retiring, he opened a repair department.', 'A company remembers that Lee loves cooking and took a training class in his spare time to learn about nutrition and improve cooking skills.', 'Laid-off female worker Chen has accumulated a wealth of knowledge and experience while raising her children, and then opened a kindergarten on the advice of her friends.']