If you want to represent cosmetics online, you first need to understand the requirements of the brands and companies involved. Some brands may require you to have a certain sales track record or experience, and some companies may need you to pay a certain agency fee.

Once you fulfill the agency requirements, you can sign an agency contract with the brand or company and get the agency rights. Next, you can promote and sell the product on social media, e-commerce platforms, your own website and other channels.

It should be noted that the agent cosmetics need to comply with the relevant laws and regulations to ensure product quality and safety, and to maintain their brand image.

In addition, when choosing a cosmetic brand, it is recommended to choose a well-known brand or a company with a good reputation to ensure product quality and market demand. At the same time, you also need to understand the product's ingredients, efficacy, applicable population and other information in order to better serve consumers.

In short, the agent cosmetics need to have a certain degree of professional knowledge and sales experience, and to strictly comply with the relevant laws and regulations and brand regulations, in order to ensure their own and consumers' rights and interests.