1. Imperfect macro policies: relevant laws, regulations and policy standards promulgated by the state and local governments are still imperfect or insufficient.

2. The influence of corporate culture: Some companies have a traditional idea that employees should work all the year round, and the competition in the labor market has also aggravated this situation. Therefore, enterprises may be reluctant to give employees a vacation, or provide less paid annual leave.

3. The influence of economic pressure: In the case of bad economic situation, enterprises may pay more attention to cost saving, thus reducing the arrangement of employees' collective vacation.

4. Personal choice of employees: Some employees may refuse to take a vacation for personal reasons, such as low income, busy work, facing promotion and salary increase and many other factors.

In view of the above problems, with the joint efforts of the government, enterprises and employees, we can start from the following aspects:

1. Improve laws, regulations and policy standards.

2. Encourage enterprises to implement more flexible working systems such as flexible working system to better meet the individual needs of employees.

3. Strengthen employee education and publicity to improve employees' knowledge and cognition of paid annual leave.

4. Strengthen supervision and law enforcement, and punish and punish enterprises that violate relevant regulations.

Generally speaking, paid annual leave is one of the important measures to provide employees with better working conditions and welfare protection. The realization of paid annual leave requires the joint efforts of all parties and cannot be achieved overnight.