R & D refers to research and development, research and development, and research and development. It refers to various research institutions, enterprises, or individuals acquiring new knowledge of science and technology (excluding humanities and social sciences), creatively applying new knowledge of science and technology, or substantially improving technology, The continuous system activities with clear objectives for products and services include a series of system activities such as system and equipment testing, installation, maintenance, and repair.

　　In February 2016, the "National Science and Engineering Index" released by the National Science Foundation showed that China has become the world's second largest research and development country.

　　As far as I know, global R & D spending is generally on the rise, and it is still concentrated in North America, Europe, and East and Southeast Asia. The United States is still the world's largest R & D country, and China ranks second. China's R & D expenditure is close to the sum of the EU. Of the total global R & D expenditures in terms of purchasing power parity, China accounts for about 20%, second only to the United States (27%); Japan ranks third with 10%; Germany ranks fourth with 6%; followed by South Korea, France, Russia, the United Kingdom, and India account for 2% to 4% of total global R & D spending.