Faced with the severe challenge of an aging population, Professor Peng Xizhe put forward an insightful proposal - to delay the retirement age. He believes that China's retirement age is relatively early, and the gap with the average life expectancy has led to nearly 30 years to receive a pension after retirement, and the current pension system cannot be maintained for a long time. Therefore, it is imperative to implement a delayed retirement system. 
The middle-aged and older workforce has a wealth of experience and skills that cannot be replaced by younger people. Delaying retirement can not only alleviate the pressure of pension, reduce the pressure of pension expenditure, and ensure the sustainability of pensions, but also mean more working years and income for individuals. As life expectancy increases, people can have more time to accumulate wealth and experience. Delaying retirement can delay the use of pensions and better protect one's old age.
However, delaying the retirement age also faces some challenges and controversies. For some people who work physically or in high-risk and stressful jobs, delaying retirement can be physically and psychologically burdensome. For some low-skilled workers, delayed retirement may exacerbate employment pressures. In addition, delayed retirement may involve a range of issues related to the reform of the social security system. 
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Therefore, when implementing the delayed retirement policy, we need to fully consider various factors and adopt a gradual reform approach to gradually raise the retirement age. At the same time, a series of supporting measures need to be taken. For example, we should increase the training of the elderly labor force to improve their employability skills and competitivenessStrengthen the supervision of the labor market and protect the labor rights and interests of the elderly;We should strengthen the reform and improvement of the social security system, and raise the level of protection for old-age insurance and medical insurance. Only in this way can the delayed retirement policy really play a positive role and realize the sustainable development of population aging and old-age security.