We are very sad to announce that, Dr./Prof. Tianchu Li, passed away in Beijing on 28 December 2022 at the age of 77 due to a fatal disease.

Dr./Prof. Tianchu Li was a Chief Scientist of the National Institute of Metrology (NIM) of China, a member of the Chinese Academy of Engineering (CAE), a renowned metrology scientist, a leader in the development of China's national time and frequency measurement system, and a great contributor to the advancement of time and frequency measurement science.

According to Dr./Prof. Li's last wishes and after consulting his family, the funeral service will be simple and no farewell ceremony will be held.

If you would like to express your condolence and pay him the last tribute, please send your message to NIM at

With our deepest condolence

National Institute of Metrology (NIM), China