"Get Ali P7 stock in four years" is a reward or equity incentive plan in Alibaba's compensation system. In Alibaba's compensation system, P7 usually refers to the company's senior position or management level.

According to the information you provided, "Get Ali P7 stock in four years" means that when you get this stock, you need to wait four years to get it all. This is a common equity incentive plan designed to encourage employees to stay in the company for a long time and contribute to the company's performance.

Depending on the specific details of the plan, there may be some conditions and restrictions. Usually, these stocks are released in batches over a period of four years, and employees can gradually obtain shares. If an employee leaves during these four years, he or she may lose the corresponding equity according to the conditions stipulated in the plan.

It should be noted that the above is only a general explanation of this phrase, and the specific situation may vary depending on the equity incentive plan formulated by the company. If you want to know more about the specific details of this plan, it is recommended that you consult the relevant company internal policies or communicate with relevant personnel.