1.   The 15 years long impression on Tsinghua University.

2.   The discovery of isotopes in 1910 by the Nobel Prize winner Frederie Seddy and its influence on the human activities, plus prospective applications.

3.   The relationship between China and Russia like a mirror of the relationship between Department of Engineering Physics of Tsinghua University and MEPhI.

4.   A short presentation of molecular Physics Department of MEPhI (when founded, major direction of research, main achievements).

5.   Themes proposed for collaboration between Tsinghua (Department of Engineering Physics) and MEPhI.

(a)           Further development of the theory for optimum cascade for binary isotope mixture separation.

(b)           Broadening this approach to multicomponent isotope mixtures.

(c)           Calculation of cascades for several fixed concentrations in a product flow.

(d)           Development of techniques to calculation cascade concentrations with the extremely high accuracy.

6. Acknowledgement.