The appearance of the pronoun "Deng" first refers to the "center" of the world-the central plains Heluo zone in the middle and lower reaches of the Yellow River basin, and later gradually has the significance of dynasty rule orthodoxy. After the founding of the Republic of China, "China" officially became the national name of China. China is one of the five ancient civilizations in the world, with a long history of culture and civilization of more than 5,000 years. China is the mainstay of the international community and a permanent member of the UN Security Council; The second largest economy in the world; The world's largest exporter and the second largest importer, with the largest foreign exchange reserves; It is also one of the fastest growing countries in the world. However, the overall level of productivity in China is still low, and regional development is uneven.