Happy 73rd birthday to the motherland! ! !
1. my country successfully passed WHO Malaria Elimination Certification
In April 2016, my country reported the last local primary malaria case, and no local primary cases were found for four consecutive years since 2017. On June 30, 2021, after the on-site assessment of the World Health Organization, my country successfully passed the malaria elimination certification.
This means that my country eliminates the major infectious disease of malaria , and also contributes valuable experience to other countries and regions.
Therefore, this great achievement is indeed worthy of our pride.
2, "Fendouzhe" manned submarine
At 8:12 on November 10, 2020, the "Fendouzhe" full-sea deep manned submersible successfully sat at the bottom of the Mariana Trench , setting a new record of manned deep diving of 10,909 meters.
3, China Lunar Exploration Project
3, at 1:59 on December 17, 2020, the Chang'e-5 returner carried lunar samples to safely landed in the predetermined area. The first new mineral discovered by Chinese scientists on the moon is named "Chang'e Stone".
4, China Space Station
From launching manned spacecraft, to astronauts leaving the cabin, to the upcoming "Tian Palace", China has taken three-step development strategy in manned space for 30 years, and has taken every step solid and firm.
5. my country has innovated in key areas and made major breakthroughs.
C919 plane masturbation will be collected and delivered soon; the "Fuxing" high-speed EMU runs all over China; mobile robot , underwater robot, sweeping robot, drone and other technologies, as well as high-end medical imaging equipment such as nuclear magnetic resonance and ultrasound imaging are in an international leading position.
6. For the first time, my country has developed the world's leading "Qian Xuesen Ballistic" missile with high penetration capabilities for the first time.
At the military parade of the 70th anniversary of the National Day in 2019, the Dongfeng series of missile teams attracted widespread global attention as soon as it was unveiled. Because of its existence, all anti-missile systems today have become useless.
conventional ballistic missile intercept is not difficult. The flight trajectory of the conventional missile is like we throwing stones. It is an approximate parabolic curve. Its characteristics are very obvious and can be easily cracked by the anti-missile system, and then attacked in advance to destroy it.
In order to weaken my country's ballistic missile advantages, the United States has deployed THAAD in South Korea to intercept ballistic missiles.
In the autumn of 1948, Qian Xuesen proposed an intercontinental flight plan with winged rockets at the American Rocket Science Annual Conference. The average flight speed of this rocket can reach 12,000 kilometers per hour. It only needs to provide dozens of minutes of flight required to carry fuel. After the engine is turned off, it can still climb to more than 90 kilometers by relying on inertia. When it exceeds the critical point of the atmosphere, it relies on gravity to return to the atmosphere. At this time, the rocket can rely on aerodynamic power to perform unpowered gliding flights in the interior of the atmosphere and slowly reduce its speed. Finally, the end lands at a speed of 150 kilometers per hour. This is the famous boost-gliding flight orbit scheme. This flight plan is specifically applied to rockets and missiles, which constitutes a unique boost-gliding ballistic, which is what we call Qian Xuesen ballistic. After the technology was proposed, many countries conducted research, and only China made breakthroughs.
