There are the following methods and respective characteristics: self-produced and self-sold.

It refers to the sale of products produced by private enterprises.

Enterprises operating in this way are generally small in scale and are mostly handicraftsmen, such as shoe stores, clothing stores, etc.

Most of them are shops in front and factories in the back, producing and selling at the same time.

Purchasing and sales agency.

It refers to a kind of commercial activity in the form of a contract, which is entrusted by others to purchase and sell on behalf of others.

This mode of operation is flexible and has a wide range of operations. Most of the products are agricultural and sideline products. It requires a certain operating site, from which the operator charges a certain handling fee.

Operators who purchase and sell on behalf of others must be reputable.

Processing with supplied materials, processing with supplied samples, and assembly of supplied parts.

Incoming material processing is to change the shape, nature, surface condition and use of raw materials and semi-finished products, and process them into products according to requirements; incoming sample processing is to process according to the needs of the order, in accordance with the drawings and design requirements of the order, and supply the product to the orderer after it is formed.

;Incoming parts assembly is to combine parts provided by the other party into products according to the requirements of the contract.

Regardless of the mode of operation, processing with supplied materials, processing with supplied samples, or assembly with supplied parts, the enterprise must sign a contract with the other party to clarify the rights and obligations of both parties.

wholesale.

In commercial activities, goods are sold in batches and in bulk, and their selling prices are not lower than retail goods. They are sold to commodity operators and retailers, and are not sold directly to final consumers.

Wholesale goods require certain warehousing equipment, storage and transportation conditions and more funds.

retail.

It refers to buying goods in batches and bulk and selling them sporadically, mostly to the final consumer repair industry.

Restore damaged utensils, facilities, and items to their original condition or achieve their original functions.

transportation industry.

It is further divided into passenger transport and freight transport. Due to the different means of transport used, it is further divided into non-motor vehicle transport or motor vehicle transport, ship transport, railway, road transport and water transport.

Private companies do not operate rail transportation.

consultation service.

Consulting services are an industry that has emerged in recent years. Private enterprises use the scientific and technological knowledge they have mastered in a certain field to provide customers with services, experience, material data, design, etc., so that customers can gain knowledge and benefits from receiving consultations.