The Principle of "the Autonomy of the Parties' Will"in Applying the Law——The autonomous law out of the international contract

The term party initiated in the 16th century, makes the milestone of the theory of the applicable law concerning contracts, which means it develops from objective theory to subjective theory. The proposition of the proper law which holds the principle focus on the autonomy of will with the closest relation as its aid, highlights the theory concerning the applicable law concerning contracts, which the mechanical manipulation of the former applicability of the contract as an entity. It embodies the tendency of the legal applicability of the contracts of the international private law.