Social commodity packaging is based on three moral principles:profiting with principle, mutual benefit and honesty.

Chinese traditionary commerce formed its own features in practice,including the thought of pursuing both benefit and righteousness,the strategy of changing for success,the concept of peace and the quality of honesty.

The importance and necessity of honesty in the course of socialist market economy is illustrated,and then the basic ways of honesty construction at the new age in our country is analyzed.

As the law foundation of the establishing of right to variation in project, the honesty and credit principle has been discussed in this paper.

The theoretical basis for liability for miss promise is breaching the devoir of the foregoing contract that is based on honesty and credit and can be classified into the liability for fault.

Essential reason can be concluded that companies and peasants are lack of honesty and credit.

Author points out in order to promote further development enterprise should rely on honesty and credit.

Good Faith and Its Maintenance in Harmonious Society;

On the Application of the Principle of Good Faith in the Administrative Contract;

An Economic Analysis on the Principle of Good Faith in Law of Contract;

Culpa in Contrahendo is the responsiblity of compensation for damage that the party should be born to the other for violating the honest credit principle in the course of ordering a contract.

The main ideas are:unifing the contract acts,requlating markets activities concerning contracts,giving full play to the effect of the con tract system,distributing the responsibilities of the people concerned,developing honest credit,renewing the contract system,trying to meet the international standards,protecting lawful creditor s rights,ruling out the contract risks.

This paper further clarifies the important roles the honest credit principle should play in the relations of contracts by expounding the concept and making of contracts,contract fulfilment.