It is impossible to judge his level by what he sends. Qimen is essentially an advanced astrophysics.
Taoism calls B, C and D "three rates". Opening, breathing, birth, injury, supervision, scenery, earthquake and death are called eight doors. Its essence is an advanced astrophysics, which reveals the functions of the eight planets in the solar system and the earth's magnetic field, and its basic pattern reflects the personnel, life and social system of society, as well as astronomy, geography and phenology.