Fig. 1. A childhood photo in 1945

Fig. 2. Circuit of crystal oscillator (a), the variation of the enhancement factor of neutron diffraction with the crystal oscillator power (b)^[3]

Fig. 3. The circuit diagram for the measurement of prompt neutrons in fission (the main part of neutron multiplicity analyzer is in the dashed box) (a), multiplicity distribution P_ν of prompt neutrons in ²⁵²Cf spontaneous fission (b)^[6]

Fig. 4. The ratio of the experimental fragment anisotropy to the value of the SPTS model as a function of E_c.m./V_B (a, b), the ratio A_expt /A_theory as a function of E_c.m./V_B. The values of A_theory were calculated in terms of the SPTS model and the pre-equilibrium fission model for the systems with α>α_BG and α<α_BG , respectively (c, d)^[8]

Fig. 5. Operating the experimental equipment used for measuring the angular distributions of fission fragments in 1990s

Fig. 6. A draft of outline for writing the strategic research report on May 14, 2020

Fig. 7. Taking charge of the 10^th international conference on nucleus-nucleus collision (NN2009) held in Beijing in 2009

Fig. 8. Academician ZHANG Huanqiao is making a speech at the 35^th anniversary celebration of Beijing tandem accelerator national laboratory on April 16, 2023