Cookie Policy

  1. This Cookie Policy provides information about how and when Yatsen Trading(HK)Limited (“we,” “us,” or “our”) use cookies in connection with this website (the “Site”). For more information on our privacy practices generally please visit our Privacy Policy.

    What is a Cookie?

    A cookie is a small file placed onto your device that enables a variety of features and functionality. Cookies also enable you to easily share content and help us serve relevant ads to you. Cookies can do this because websites can read and write them, enabling websites to recognize you and remember important information that will make your use of a website more convenient (for example by remembering preference settings).

    Does Perfect Diary Use Cookies?

    Yes. We use cookies and other technologies (for example web beacons and pixel tags) to analyze service usage to ensure everyone who uses our site has the best possible experience and for marketing purposes. For example, when you receive an email from Perfect Diary, it may contain a click-through URL which links to our web page. If you click the link, we will track your visit to help us learn about your preferences for products and services and improve our customer service. You can unsubscribe from the mailing list at any time if you do not want to be tracked in this manner. Cookies also help us keep your account safe. By continuing to visit our site or use our services, you are agreeing to the use of cookies and similar technologies for the purposes we describe in this policy.

    What Types of Cookies Do We Use?

     We use a variety of cookie types:

    • Preference Cookies. Preference cookies collect information about your choices and preferences, and allow us to remember language or other local settings and customize the Site accordingly. 
    • Strictly Necessary Cookies. Strictly necessary cookies are necessary for the Site to work and to enable you to move around it and to use its features.  Without these cookies, the Site will not perform as intended and we may not be able to provide our Site or certain services or features you request.
    • Social Plug-in Tracking Cookies. Such cookies are used to track members [and non-members] of social media networks for market research analytics, and product development.
    • Analytics Cookies. Analytics cookies collect information about your use of the Site, and enable us to improve the way it works.  For example, analytics cookies show us which are the most frequently visited pages on our Site, help us record any difficulties you have with our Site, and show us whether our advertising is effective or not.  This allows us to see the overall patterns of usage, rather than the usage of a single person.
    • Advertising Cookies. Advertising cookies are used for marketing purposes. This is discussed below in greater detail.
    • Affiliate Cookies. Our Site may contain promotional links to other companies’ sites. If you follow one of these links or interact with that other site, a cookie is used to tell the other site that you came from one of our websites. That other site may then pay us a small amount for the successful referral.


    All of the cookies above are either persistent cookies or session cookies. A persistent cookie helps us recognize you as an existing user, so it’s easier to return to the Site or interact with our services repeatedly. A persistent cookie stays in your browser and will be read by the website when you return to our Site or a partner site that uses our services. Session cookies only last for as long as the session (usually the current visit to a website or a browser session).

    What is Do Not Track (DNT)?

    DNT is a concept that has been promoted by regulatory agencies such as the U.S. Federal Trade Commission (FTC), for the Internet industry to develop and implement a mechanism for allowing Internet users to control the tracking of their online activities across websites by using browser settings. There is an effort by and among industry groups, Internet browsers, technology companies, and regulators to develop a DNT technology standard. No standard has been adopted to date. As such, we do not generally respond to “do not track” signals, nor do most other websites.

    How are Cookies Used for Advertising Purposes?

    Cookies and other ad technology such as beacons, pixels, and tags help us serve relevant ads to you more effectively. They also help us provide aggregated auditing, research, and reporting for advertisers, understand and improve our service, and know when content has been shown to you. We may use third party advertising companies to serve ads when you visit our website. These companies may employ cookies and clear GIFs to measure advertising effectiveness. We encourage you to read the privacy policies of these third party advertising companies if you have any concerns. Note: Because your web browser may request advertisements and beacons directly from third party ad network servers, these networks can view, edit, or set third party cookies, just as if you had requested a web page from their site. Ads served by us may also set third party cookies.

    Unless you clear these cookies from your browser, we may use this information to:

    • provide more relevant, interest-based advertising.
    • provide aggregate reports of ads activity to advertisers and websites hosting the ads.
    • help website and app owners understand how visitors engage with their sites or apps.
    • detect and defend against fraud and other risks to protect users and partners.
    • improve our products.


    Controlling Cookies

    Most browsers allow you to control and erase cookies through their settings preferences. However, if you limit the ability of websites to set cookies, you may worsen your overall user experience, since it will no longer be personalized to you. Additionally, Site users who do not want their data collected with Google Analytics can visit the Google Analytics opt-out page and install the Google Analytics opt-out add-on for your browser:

    You may opt out of receiving personalized ads from other companies that perform ad targeting services, including some that we may work with as Advertising Partners via the Digital Advertising Alliance (DAA) website here. You may use the Network Advertising Initiative (NAI) opt out tool here, which will allow you to opt out of seeing personalized ads from NAI approved member companies.

    Keep in mind that, if you opt out of interest-based advertising, you may still see customized advertising displayed by advertising networks from which you have not opted out. In addition, your opt out will not prevent any advertising network from displaying advertising that is not customized to you and your interests and, consequently, may be less relevant to you. Please also note that you will need to make such choices on each browser and device you may use to visit our Site.


    Contact Us

    If you have any questions concerning this policy please contact us at