Importance and necessity Reform and opening up have been crucia to the cause of the Party and the people enabling us to catch up with the times ingreat strides. The third plenary session ofthe 11th CPC Central Committee was a landmark event that ushered in a newperiod: one of reform, opening up, and socialist modernization. The third plenary session of the 18th CPC Central Committee was also of epoch-making significance. lt marked the start of a new journey of comprehensively deepening reform in the new era with systematic and holistic plans, thus paving the way for a brand new stage in China's reform and opening up endeavors.