2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52441In this letter, I indicate that complex daor field should also have spinor suffixes. The gravitation and gauge fields are unified under the framework of daor field. I acquire the elegant coupling equation of gravitation and gauge fields, from which Einstein's gravitational equation can be deduced.7 pages, the second letter on daor fieldHigh Energy Physics - Theorytext