Chronicle of events

May 19, 1950  The Institute of Modern Physics, CAS (IHEP predecessor) was established, with Wu Youxun concurrently serving as its director and Qian Sanqian its deputy director. Its address was 42 Donghuangchenggen, Beijing.
October 6, 1953 The CAS academy meeting decided to change the name of the Institute of Modern Physics to the Institute of Physics, CAS
July 1, 1958  The Institute of Atomic energy was established with its new research base (First Department) located in Tuoli and the Institute of Physics (First Department) in Zhongguancun. It was under the dual leadership of the Second Ministry of Machine Building and CAS, with the former taking most responsibilities.
September 11, 1972 Premier Zhou Enlai wrote back to Zhang Wenyu and Zhu Guangya. He made the remarks on high energy physics and pre-fabrication research, "This issue should not be delayed any longer. The Chinese Academy of Sciences must pay close attention to basic science and theoretical study and at the same time, combine the theoretical study and scientific experiment. The research on high energy physics and pre-fabrication of high energy accelerator should be one of the main projects to which CAS is to attach great importance.”
February 1, 1973 According to "the Report on Research in High Energy Physics and Pre-fabrication of High Energy Accelerator” by the Second Ministry of Machine Building (SMMB) and CAS, approved by Premier Zhou Enlai, the Institute of High Energy Physics, CAS was established on the basis of the First Department of the Institute of Atomic Energy. The jurisdiction was shifted from SMMB to CAS. Its director was Zhang Wenyu.
December 23, 1975  According to "the Report on Accelerator Pre-fabrication and Construction"by the State Planning Commission, approved by Premier Zhou Enlai and Vice premier Deng Xiaoping, Project   753 started.
November, 1977 Chairman Hua Guofeng and the Party Central Committee gave green light to" the Report on Speeding up the Pre-fabrication and Construction of Accelerator" and the Baqi Project began.

January 6, 1978
Comrade Fang Yi met with Comrade Tang Xiaowei and others who were leaving for DESY to join S. C.C. Ting's group.
September 1, 1978 IHEP resumed recruiting graduate students with the first batch of graduate students admitted.
January 31, 1979 Comrade Deng Xiaoping signed the Agreement on Cooperation in Science and Technology between the People's Republic of China and the United States of America. To promote the cooperation between the two countries in the field of high energy physics, Comrade Fang Yi and Mr. Schlessinger signed the Implementing Accord on the Cooperation in the Field of High Energy Physics between the State Commission of Science and Technology (SCST) and the U. S. Department of Energy. This is the first implementing according under the general agreement on cooperation in science and technology between the two countries.
May 4 - 8, 1981  The Headquarters For Project Baqi, SCST and Department of Physics and Mathematics, CAS jointly organized the Meeting of the Feasibility Study of the Readjustment of the Research Base Scheme at Yuquanlu.
Sept. 22 –25, 1981 Department of Physics and Mathematics, CAS held in Beijing the Review Meeting on the 2.2 GeV Electron Positron Collider Pre-fabrication Scheme. Following the discussions about the  R & D items of injector, storage ring and detector proposed by IHEP, it was decided to carry out the research on the development of the collider.
January 21, 1981 IHEP submitted to CAS the Readjusted Construction Plan on BEPC Project with 2.2 GeV.
March 23, 1982 Research on BEPC prefabrication started. Circular on restructuring laboratories of accelerator and experimental physics was issued. It was decided to establish the electron linac laboratory, the storage ring laboratory, the proton linac and application laboratory, the control and beam measurement laboratory, the first experimental physics laboratory and the second experimental physics laboratory and withdraw all the former laboratories of accelerator and experimental physics. 
June 19, 1982 A 21-member study group was sent to SLAC to complete the third version of the BEPC preliminary design with all the main parameters fixed.
December 17, 1982  The first proton linac ever designed and built in China produced the first proton beam with the energy of 10 MeV and current intensity of 14 mA.
April 25, 1983 The State Council ratified the Report on Examining and Approving the Construction of a 2.2 GeV Electron Positron Collider submitted by the State Planning Committee. The project consisted of constructing a 2.2 GeV electron positron collider and the extension of the 10 MeV proton linac to a 35 MeV proton linac.
December, 1983  It was decided at the 103rd Meeting of the Party central committee that the BEPC project was designated as one of the state key projects and the leading group for this project was set up.
June 25-July 4, 1984 The review meeting on the BEPC detailed design was held in Beijing. The meeting passed the review report submitted by the Technical Review Panel and suggested that the departments concerned approve this detailed design.
October 7, 1984  The ground was broken for the BEPC project. Deng Xiaoping and other Party and state leaders laid the foundation for it.
January 11, 1985 CAS approved the trial implementation by IHEPof the postdoc research system.
August 12, 1985 Following the commissioning of the 35 MeV proton linac, the first beam was produced.
May 6, 1986  The overall installation of the BEPC started. Gu Yu, Lin Zongtang and Yue Zhizhong as well as 300 representatives attended its opening ceremony.
October 16, 1988 Electron positron collision was realized at the BEPC.
October 24, 1988 Deng Xiaoping and the Party and state leaders inspected the BEPC project and extended their regards to the builders. Deng made the important remarks "China must have a place in the realm of high technology".
April, 1989 Beijing Spectrometer (BES) was moved to the interaction point. The overall test of it began, and it was calibrated with the obtained Babar events.
May, 1989 The 35 MeV Beijing Proton Linac and its application equipment passed the appraisal.
September, 1989 Physics began with BES.
January, 1990  The air shower array for observing ultra high energy γ at Yangbajing, Tibet was mostly accomplished with 44 detectors operating round the clock and recording the shower events incurred by ultra high energy cosmic ray.
July 21, 1990  BEPC passed the state acceptance test.
1991  The synchrotron radiation facility was put in trial operation after the commission was over. It was open to domestic users for the  first time.
1991  The internet of the computer center was connected with Stanford Linear Accelerator Center, U.S.A. and the State Energy Super Computer Center, thus improving the computer environment of IHEP to a new level.
March, 1991 CAS approved IHEP and the Shanghai Institute for Nuclear Research to jointly set up the nuclear technology analysis open laboratory.
August 13, 1991 The Beijing Electron Positron Collider National Laboratory was set up with Fang Shouxian serving as director, Deng Dazhao and Zheng Zhipeng as deputy director and Academician He Zexiu as chairman of the Science Committee.
January 7, 1993 The precise measurement result of τ mass was elected one of the ten outstanding state achievements of 1992.
March, 1993 The Computer Center established a 64k BPS high speed network for communications and data transmission, which  was connected with all high energy physics labs in the world. It also provided more than 60 research institutions and universities with the service of e-mail and information retrieval.
May, 1993 CAS approved the Feasibility Study Report on the BEPC Upgrade Item and the Feasibility Study Report on the BES Upgrade Item.
May 26, 1993 The Beijing Free Electron Laser (BFEL) succeeded in producing infrared excited radiation, the first one of nearly 10 free electron lasers in Asia to produced lasing signal.
December 28, 1993 The lasing of BFEL reached saturation, the first of its kind in Asia reaching this goal, chosen as one of the ten 1993 great scientific and technological achievements of the country.
May, 1994 IHEP computer network was connected to Internet and www.
November, 1994 Expansion of Yangbajing experimental station was completed for Sino Japanese collaboration on cosmic ray experiment , with the extended air shower array covering an area of 60000 square meters, which becomes one of the four arrays in the world for research on high energy γ astronomy and cosmic ray.
April, 1994 The state earmarked money for tao charm factory feasibility study.
Jan. 16, 1995 The cosmic ray and high energy astronomy open laboratory of IHEP was established.
1996  The automatic tracking atmospheric Cherenkov telescope was developed, adjusted and trial-operated, and then put in official operation.
Feb.7, 1999  BEPC/BES/BSRF upgraded items successfully passed  appraisal. 
June 28, 1999  The Science and Technology Leading Group of the State Council decided to increase the fund for BEPC operation and upgrade as well as future R & D.
December, 1999 The knowledge invention project of the Theoretical Physics Division passed the appraisal of experts organized by the Bureau of Basic Science of CAS.
July 27, 2000 The Science and Technology Leading Group of the State Council examined and passed the Report on the Developmental Goal of China's High Energy Physics and Advanced Accelerators, and also agreed to have BEPC thoroughly upgraded.