It is to show one party party signals false case false, or conceal true condition intentionally, prevail on the other side signs the act of the contract with its. Threatening it is to point to wait in order to give the life of citizen and its relatives and friends healthy, honorary, reputation, worth cause damage or cause in order to give corporative honorary, reputation and worth damage to coerce, force the other side to violate true meaning to express to order the conduct that sign a contract with its. With threatening means, it is to collect a branch to force person be expropriationed to be in with threatening method did not get due be forced to remove below compensation condition; Be collected however person with threatening method, force collect a branch to satisfy its to ask. With the contract that threatening, fraudulent means concludes, if just damaged the rights and interests of contract one party, do not harm national interest, be not disable absolutely, however can the contract of cancel. One party of legal accredit fall victim is OK cancel this one agreement, the interest that occupies oneself by fall victim root tries to consider, the decision is to let a contract continue become effective or application give cancel. But what should notice is, the time of requirement cancel ought to be in know by con inside a year or because of threatening and after signing an agreement inside a year.