China is predicted to have 400 million retirees in 2035 - the same year the state pension fund is expected to run out. In this episode, Jasmine Tse analyses the central government's race to prepare the nation's finances, infrastructure and health system. Global health policy expert Professor Winnie Yip unpacks the challenges ahead, explains why robots or immigrants won’t fix them, and reveals a shift in China's culture of filial piety and caring for the elderly. Post desk editor Zhou Xin looks…