Within a week, the two academicians passed away one after another, and the Republic this year has left 21 academicians of the two academies farewell.

　　According to Guangming Daily, academician of the Chinese Academy of Sciences, geodesy and geophysicist, former director of the Institute of Surveying and Geophysics of the Chinese Academy of Sciences, dean of the Wuhan Branch of the Chinese Academy of Sciences, and researcher of the Institute of Precision Measurement Science and Technology Innovation of the Chinese Academy of Sciences Xu Houze, He was treated ineffective due to illness and died in Wuhan on August 31, 2021, at the age of 87.

　　Public information shows that Xu Houze was born on May 4, 1934 in She County, Anhui Province.

Graduated from Tongji University in 1955.

Graduated from the Institute of Surveying and Geographic Physics, Chinese Academy of Sciences in 1962.

In 1991, he was elected as a member of the Chinese Academy of Sciences (academician).

　　Xu Houze is mainly engaged in the study of modern external gravity field approximation theory, and has made important contributions to the establishment of a new crossover field of geodesy and geophysics in the world and China-dynamic geodesy.

He has always guided the development of disciplines with a forward-looking vision: "We should face the current high-tech development in the world, stand at the height of history, and make choices that can withstand the test of history. This is the future of interdisciplinary development."

　　Xu Houze is also the second academician to die within a week-6 days ago, on August 25, one of the founders and pioneers of explosive mechanics in my country, academician of the Chinese Academy of Sciences, academician of the Chinese Academy of Engineering, winner of the highest national science and technology award, China Zheng Zhemin, a researcher at the Institute of Mechanics of the Academy of Sciences, died in Beijing at the age of 97 due to ineffective medical treatment.

　　So far, 21 academicians of the Chinese Academy of Sciences and Chinese Academy of Sciences have passed away this year.

As the highest academic titles established by the country in science and technology and engineering technology, the academicians of the Chinese Academy of Sciences and the Chinese Academy of Engineering are both lifetime honors and are called "Academicians of the Chinese Academy of Sciences".

　　On January 28, academician Wang Shouwan of the Chinese Academy of Sciences passed away due to illness at the age of 98.

Wang Shouwan is a master of Chinese astronomy and the founder of radio astronomy in my country. He was once the director of the Beijing Astronomical Observatory.

　　On February 5, Shen Zhonghou, an academician of the Chinese Academy of Engineering and a professor at China University of Petroleum (Beijing), died in Beijing at the age of 93.

Shen Zhonghou is a well-known oil and gas well engineering technology expert, water jet expert, educator, and founder of the discipline of oil and gas well engineering.

　　On February 7, Cheng Rongshi, an academician of the Chinese Academy of Sciences, a polymer physics and physical chemist, and a professor at Nanjing University, died in Guangzhou at the age of 93.

　　On March 2, Zhou Yulin, an academician of the Chinese Academy of Sciences, a mathematician, and a researcher at the Chinese Academy of Engineering Physics, died in Beijing at the age of 98.

Zhou Yulin was one of the main organizers and pioneers of early mathematical research in the design of my country's nuclear weapons, and he has made significant contributions to the development of my country's nuclear weapons industry.

　　On March 12, Zhou Youyuan, an academician of the Chinese Academy of Sciences, a professor at the University of the Chinese Academy of Sciences, and a researcher at the National Astronomical Observatory, died in Beijing at the age of 82.

　　On March 22, Peng Shilu, an academician of the Chinese Academy of Engineering, the first chief designer of China's nuclear submarines and a nuclear power expert, died in Beijing at the age of 96.

　　On March 26, Shen Shanjiong, an academician of the Chinese Academy of Sciences and a researcher at the Center for Excellence in Molecular Plant Science of the Chinese Academy of Sciences, passed away in Shanghai at the age of 103.

　　On March 27th, Xie Yuyuan, an academician of the Chinese Academy of Sciences and a researcher at the Shanghai Institute of Materia Medica of the Chinese Academy of Sciences, died in Shanghai at the age of 97.

　　On March 31, Li Jingwen, an academician of the Academy of Engineering, an economist and a management scientist, died in Beijing at the age of 89.

　　On April 28, Min Guirong, an academician of the Chinese Academy of Sciences, an academician of the Chinese Academy of Engineering, an engineering thermophysicist and a space technology expert, died in Beijing at the age of 88.

　　On May 6, Liu Xingtu, a member of the Academy of Engineering and a wetland ecologist, died in Changchun at the age of 85.

　　On May 14, Wang Yuan, an academician of the Chinese Academy of Sciences and a mathematician, died in Beijing at the age of 91.

　　On May 22, Yuan Longping, an academician of the Chinese Academy of Engineering and "the father of hybrid rice", died in Changsha at the age of 91.

On the same day, Wu Mengchao, an academician of the Chinese Academy of Sciences and "Father of Chinese Hepatobiliary Surgery", passed away at the age of 99.

　　On May 26, Chen Qingru, an academician of the Academy of Engineering, a well-known mineral processing expert and educator, died in Xuzhou at the age of 95.

　　On June 16, Huang Xiling, an academician of the Chinese Academy of Engineering and a well-known expert in foundation engineering, passed away in Beijing at the age of 94.

　　On June 27th, Jiang Jingshan, an academician of the Chinese Academy of Engineering, one of the main advocates of remote sensing technology in my country and the main pioneer of microwave remote sensing technology, died in Beijing at the age of 85.

　　On June 29, Xue Yuqun, an academician of the Chinese Academy of Sciences, a groundwater dynamicist, and a hydrogeological educator, died in Shanghai at the age of 90.

　　On August 17, Guo Jingkun, an academician of the Chinese Academy of Sciences, a well-known chemist, and a researcher at the Shanghai Institute of Ceramics of the Chinese Academy of Sciences, died in Shanghai at the age of 87.

　　On August 25, Zheng Zhemin, an academician of the Chinese Academy of Sciences, an academician of the Chinese Academy of Engineering, and a researcher at the Institute of Mechanics of the Chinese Academy of Sciences, died in Beijing at the age of 97.

　　On August 31, Xu Houze, an academician of the Chinese Academy of Sciences, a geodesy and geophysicist, died in Wuhan at the age of 87.

　　The Paper Journalist Jiang Ziwen