The involute effect refers to the fact that an individual is engaged in the same job for a long time and is maintained at a certain level, but just repeats itself without any changes and improvements. According to the above definition, Which of the following are consistent with the involution effect:. ['Xiaoli changed five jobs in three years after graduating from university.', 'Teacher Qian has worked in the library for more than ten years. Although research results are often published, he has not been promoted.', 'Lao Yang has been looking for more than 20 years in the city and has been working as a security guard for a company for a long time.', 'Aunt Liu said that her husband, Mr. Zhang, was stubborn. After decades together, Mr. Zhang did not improve. After decades, he did not improve.']