New principles for the Theory of Relativity

Some questions exist in application of the relativity theory. To solve these questions, it comes up with the constant force balance axiom and derives the force transformation formula; comes up with the correlation analysis law to explain how to correctly apply the relativity theory; comes up with the absolute speed principle, correspondence principle and relative and absolute transformation principle to solve the real time and quality questions; comes up with universal gravitation double-balanced principle to solve the black hole existing question; and judges the impossible and practically significant time travel.