China has made great progress in weaving its social safety net in the new century. By constructing the three pillars of its social protection system -the pension system, the medical care system, and social assistance -China is trying to cover all its people under the system. Regardless of these great achievements in coverage, China has been facing challenges in the era of population ageing. In addition, the system per se needs to be integrated among various groups of people. Sustaining and strengthening the three pillars will rely on labor productivity improvement, adequate choices of welfare, and efficiency improvements.