According to the theory, agreement is premise for human corporation; hard agreement is a efficient and controlled type of corporation, while soft agreement is a ineffective and uncontrolled one.

Language is ordinarily taken to be a conventional systems of rules,and communication by language is then construed to be successful due to the shared language of the participants by convention.

Austin thought, the correspondence relations between statements and world are conventional relations.

Individual good is an absolute value but that of public life can only be reached through the conventions among individuals.

According to the provision of the "Contract Law",if promissory penal sum is lower or excessively higher than the actual loss,the privy could request people s court or arbitration organization to increase or properly decrease the promissory penal sum.

That promissory is prior to statutory is a significant principle of Contract Law.

After analyzing the legislative situations and shortcomings of the system of guarantee articles period in current China, so some considerations on agreements for guarantee articles period, on the legal consequences when it is up to date and on when it is considered to be the beginning date, have been proposed.

The article holds the idea that aesthetics formed through the interaction of objective target and the aesthetic medium, the different aesthetic subjects have the same aesthetic sense toward one aesthetic objective target , which formed from the related aesthetic subjects agreement of aesthetic media .