Hong Kong Connection：Happy retirement?

Population ageing has led to concern over retirement. The longer one lives, the more they may suffer from the trial of life and illness.
A survey found that over 90% of retirees regret not having enough savings. Can the MPF system provide sufficient retirement protection for working people? Does the annuity plan only benefit the wealthy elderly? How much savings is needed in order to achieve an ideal retirement life? Everyone wants to enjoy a comfortable retirement, but is it possible in reality?