1. Trademark registration follows the principle of combining voluntary registration with compulsory registration, but the prior principle is adhered to in actual implementation;

Not all products or services can be sold without a registered trademark, except for goods that must use a registered trademark according to laws and administrative regulations;

2. A registered trademark can be used in production, sales and other business activities, but the user has no exclusive right to the trademark and may not prohibit others from using it;

3. Commodities that must use registered trademarks according to laws and administrative regulations, such as medicines and tobacco products for human use, must apply for trademark registration. Those that have not been approved for registration shall not be sold in the market;

4. It is not illegal to sell products without trademarks, as long as the products meet the quality standards stipulated by the state, and registered trademarks can bring legal protection.

The function of trademark registration:

1. Confirmation right: Trademark registration is the legal confirmation of trademark rights and represents the exclusive right to use the trademark;

2. prevention of infringement: registered trademarks can prevent others from using the same or similar trademarks without permission and avoid market confusion;

3. Enhance brand value: registered trademarks help to establish brand image and improve market recognition of products or services;

4. It is convenient for law enforcement: once an infringement occurs, a registered trademark is convenient for the right holder to defend his rights according to law, including requesting the administrative organ to handle it or through court proceedings;

5. Commercial assets: A registered trademark is an intangible asset that can be transferred, licensed or used as collateral for investment and financing.

To sum up, trademark registration is not necessary for all products or services. However, in some commodities stipulated by law, such as medicines and tobacco products for human use, trademark registration is required before they can be sold. A registered trademark can be used in business activities, but the user does not have the exclusive right to use the trademark and cannot prohibit others from using it. However, it is not illegal to sell products without trademarks, as long as the products meet the quality standards stipulated by the state, while registered trademarks can bring legal protection to products.

Legal basis:

Article 6 of the Trademark Law of the People's Republic of China

Goods that are required to use registered trademarks according to laws and administrative regulations must apply for trademark registration, and those that have not been approved for registration may not be sold in the market.