法律调整的是人的行为,法院认定合同是否有效,实际上是对人实施的行为是否有效进行认定。一个合同从动态的角度考虑,可以分为两个行为,签订合同行为和履行合同的行为。履行合同行为无效并不必然导致签订合同行为的无效。法院不能通过审理“履行合同行为”而得出“签订合同行为”是否有效的结论。 Law is the human behavior, the court finds that the contract is valid, in fact, whether the conduct of people to identify the effectiveness of the conduct. A contract from a dynamic point of view, can be divided into two acts, the signing of contractual behavior and the performance of the contract. Invalidation of contract performance does not necessarily lead to invalid contract signing. The court can not conclude whether “signing the contractual act ” is valid by hearing “performing the contractual act ”.