  The purpose of this article is to study the uniqueness problem for
meromorphic mappings from $\mathbb{C}^{n}$ into the complex projective space
$\mathbb{P}^{N}(\mathbb{C}).$ By making using of the method of dealing with
multiple values due to L. Yang and the technique of Dethloff-Quang-Tan
respectively, we obtain two general uniqueness theorems which improve and
extend some known results of meromorphic mappings sharing hyperplanes in
general position.
