In 1949, Tsung-Dao Lee published his first paper, proposed the universal Fermi weak interaction, predicted the existence of an intermediate field (i.e. intermediate boson), and contributed to the establishment of weak interaction. [1]

In 1956, Tsung-Dao Lee cooperated with Chen-Ning Yang to raise the suspects of parity conservation under weak interaction and made a significant improvement on the theory of particle physics [2].

Tsung-Dao Lee proposed the two-component neutrino theory,  analysed the role of high-energy neutrinos, and influenced the direction of theoretical and experimental research in this field for more than 20 years [3]

Tsung-Dao Lee introduced the phase factor which violates  time-reversal invariance and established the interrelationships among  neutrino mapping matrix, quark CKM matrix and the mass of light leptons and quarks. [5] Subsequently, he proposed the concept of Timeon . [6]

• Lee-Wick nucleon excited states were proposed, leading to  the research field of relativistic heavy ion collisions.

• In 1952, he made a basic contribution to the phase transition theory and proposed the Lee- Yang simple circle theorem.

• He conducted research in muIti-body problems in quantum statistical mechanics and made an important contribution to the research of superfluidity of helium-Ⅱ.

• In 1951, Tsung-Dao Lee proved the difference between two-dimensional space fluid and three-dimensional space fluid, and pointed out that two-dimensional space fluid will not produce turbulence.

• In 1950, Tsung-Dao Lee proved in his PhD dissertation that dwarfs are the late stage of the evolution of stars with similar mass and size as the sun, and made an important contribution to the development of celestial evolution theory. [1]

• Tsung-Dao Lee founded the research field of soliton stars and opened up new possibilities for building cosmological and astronomical models. [2]

• He studied the interaction between electrons and lattice fields in polar crystals . In particular , the results on the motion process of slow electrons in polar crystals have promoted the discovery of BCS superconducting theory in 1956. [1]

• A Boson-Fermi high temperature superconductor model combining Bose Einstein condensation and BCS theory was proposed. [2]

• At the beginning of this century, a new iterative method was developed to solve the Schrodinger equation and solve the convergence problem of perturbation expansion, which created a new direction in this research field.