Legal analysis: 1, the state and other funds are the source of free construction funds for the construction unit. Mainly includes: budget allocation and self-raised funds. Budget appropriation is the funds allocated by the state budget to the construction unit for construction. Self-raised funds are funds raised by local finance, departments and units and approved for the construction unit.

2. Bank loans refer to various construction funds borrowed by the construction unit from the People's Construction Bank of China, investment banks and other banks, such as construction investment loans, domestic reserve loans and temporary revolving loans.

3, the internal formation of funds refers to the construction unit in accordance with the provisions of the state to extract the retained construction funds. It mainly includes renovation fund, production development fund and construction income retention.

4. The occupation of other units' accounts in settlement refers to the temporary source of construction funds formed by the construction unit in the settlement of purchasing equipment and project funds.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 479 Acceptance is an expression of the intention of the offeree to agree to the offer.

Article 480 Acceptance is made by notice. However, unless the trading habit or offer indicates that a promise can be made through behavior.