How to answer the great changes from tradition to modernity in the past hundred years

The great changes from tradition to modernity in the past century can be described according to the history and development of China, and what we have seen and heard should be elaborated in detail. The language should be fluent and the center should be prominent. The understanding of China's great changes in the past century is to stick to the road of Socialism with Chinese characteristics and keep on developing Socialism with Chinese characteristics. Practice tells us that the direction determines the future and the road determines the destiny. If we want to take our destiny into our own hands, we must be firm.