Zhonghua ZHANG, Male, Han nationality, born in Suzhou, Jiangsu Province on July 2, 1940, member of the Chinese Academy of Engineering, an expert in electromagnetic metrology and a member of the Communist Party of China. In 1962, he graduated from the Department of Electrical Engineering of Tsinghua University, majoring in high-voltage technology, and then entered the Graduate School of Tsinghua University, where he did postgraduate study in the basic electrical engineering teaching and research group of the Department of Electrical Engineering. In 1967, he was assigned to the Electromagnetic Department of the National Institute of Metrology, China (hereinafter referred to as NIM). He is now a first-class researcher of NIM. He once served as Vice President of Chinese Society for Measurement and Vice President of China Instrument and Control Society. He is currently the Chairman of the Editorial Committee of the Acta Metrologica Sinica and the Chairman of the Editorial Committee of the Chinese Journal of Scientific Instrument.
He has been engaged in the research and design of national standards in electromagnetic measurement for a long time. In the mid and late 1960s, he presided over the design, test and operation of the national capacitance standard. In 1997, he participated in the international comparison of 10pF capacitance organized by the Bureau International des Poids et Mesures (BIPM), and the difference with the international average was only 4×10-8, making it one of the best results in the world at that time. From 1983 to 1988, he was responsible for establishing the national powerful magnetic field standard (2~12 Tesla) by using the low-temperature nuclear magnetic resonance method, with an uncertainty of 6×10-5. This standard remains one of the best of its kind in the world today. From 1987 to 2002, a national resistance standard for quantized Hall effect was developed. In the international comparison, the data provided by China is the least uncertain.
In 1992, the superconducting strong magnetic field standard was awarded Second Prize of State Science and Technology Awards (ranking first). In 2007, the quantized Hall resistance standard was awarded First Prize of State Science and Technology Awards (ranking first). In 2003, he was honored with the Ho Leung Ho Lee Science and Technology Progress Award. In 1989, he was conferred the title of National Advanced Worker, and he has received special government allowance since 1991. In 1997, he was selected as the National Outstanding Scientific and Technological Worker. In recent years, an energy balance scheme has been proposed to measure the Planck constant, contributing his wisdom and strength to the exploration and establishment of an independent quantum mass standard in China.