Commodity inspection is very rich in content, mainly including the following aspects: appearance inspection, dimensional inspection, functional inspection, packaging inspection, and mark inspection.

1. Appearance inspection. The appearance of a product is the most intuitive reference for consumers when purchasing products. Therefore, appearance inspection is the most basic link in product inspection. Appearance inspection mainly includes the shape, color, size, texture and other aspects of the product. It is required that the appearance of the product is free of damage, stains, deformation and other defects.

2. Dimensional inspection. The size of goods is one of the important indicators that consumers need to compare when purchasing. Dimensional inspection mainly includes the length, width, height, thickness, etc. of the product. Products that do not meet the size requirements need to be returned or exchanged in a timely manner.

3. Functional inspection. The function of a product is the most important factor that consumers pay attention to when purchasing. Therefore, the functional inspection of the product is also very important. Functional inspection mainly includes the performance, reliability, durability, detection efficiency, etc. of the product. Products whose functions do not meet the requirements need to be returned, exchanged or repaired in a timely manner.

4. Packaging inspection. Commodity packaging is an important means of protecting commodities. On the premise of ensuring commodity quality, packaging inspection is also an important part of commodity inspection. Packaging inspection mainly includes the integrity, specifications, printing quality, safety, etc. of product packaging. Products whose packaging does not meet the requirements need to be returned or exchanged in a timely manner.

5. Mark inspection. Product logos are key information in product sales, including product trademarks, manufacturing dates, expiration dates, etc. Mark inspection mainly includes the correctness, clarity, and completeness of product marks to ensure that product marks are accurate.

Types of goods:

1. Durable consumer goods: such as home appliances, cars, furniture, etc. These goods can be used for many years once purchased, and usually have higher prices.

2. Non-durable consumer goods: such as clothes, food, cosmetics, etc. These goods usually need to be repurchased after being used for a period of time, and usually have lower prices.

3. Service goods: such as travel, catering, medical care, etc. These goods are usually provided to consumers in the form of services.

4. Industrial raw materials and energy: such as oil, natural gas, coal, chemical raw materials, metals, etc. These commodities are usually basic raw materials used to produce and manufacture other commodities.

5. Financial commodities: such as savings deposits, bonds, stocks, foreign exchange, etc. These commodities are tools used for asset management and investment.