Kuafu Chasing the Sun is a myth that countless Chinese people have been familiar with since childhood. Today, the myth is becoming a reality - "Kuafu I", an advanced space-based solar observatory of China's comprehensive solar exploration satellite, is trying to unveil the mystery of the sun! "Since the 1960s, the world's space powers have launched 60 or 70 solar exploration related satellites, while China has been absent from solar exploration satellites. Although China's scientific papers on solar physics rank at the forefront of the world, we are embarrassed to say that we have been at the international forefront in solar physics." Gan Weiqun, the chief scientist of "Kuafu I" and researcher of the Zijinshan Observatory of the Chinese Academy of Sciences, said, "Now, we can proudly say that" Kuafu I "will achieve a breakthrough in China's solar satellite exploration! We will make more original contributions to solar research!" Rocket launch image provided by Jiuquan Satellite Launch Center About 4.6 billion years ago, on the spiral arm about 26000 light years away from the center of the Milky Way Galaxy, a molecular cloud began to collapse under its own gravity, gradually forming the sun. The sun is our "mother star". All production and life on the earth are closely related to the sun, but its occasional "temper tantrums" will also hinder us - solar storms "blow" huge ejected materials and energy into near Earth space, which can cause strong disturbances in the Earth's magnetosphere, ionosphere, upper and middle atmosphere and other Earth space environments, thus affecting human activities. The solar activity changes periodically, with an average period of 11 years. The year when the number of sunspots reaches the maximum is called the solar activity peak year, which is the time when the solar activity is most intense. According to scientists' prediction, the period from 2024 to 2025 will be the 25th peak year of solar activity. Gan Weiqun said, "We chose to launch Kuafu I at this time to better understand the sun. Its design life is not less than 4 years, which can basically cover the maximum period of the solar peak year, which is very beneficial to our scientific research and the realization of satellite scientific goals." The scientific goal of "Kuafu No.1" is "one magnetic field and two bursts". Gan Weiqun said: "This word is specially put forward for this satellite. 'Magnetism' is magnetic field, and 'two storms' are two types of the most violent eruptions on the sun - flares and coronal mass ejections. We want to study the relationship between these three things, namely, the relationship between magnetic field and flares, the relationship between magnetic field and coronal mass ejections, the relationship between coronal mass ejections and flares, and their formation, evolution, interaction and possible causal correlation And provide support for space weather early warning. " In order to achieve this goal, "Kuafu No.1" has made many original innovations from the concept to payload development and system integration. Gan Weiqun summarized it as three international firsts: for the first time in the world, "one magnetic field and two storms" were taken as the scientific objectives of satellites and corresponding load combinations were configured; For the first time in the world, the full solar vector magnetic field, solar flare non thermal radiation imaging, coronal mass ejection solar surface formation and corona propagation were observed simultaneously on a near Earth satellite; For the first time in the world, Lehmann Alpha spectral line