2. You can use the search engine and enter the year of Yingchang UC 1 18+ to search and view the information of related electronic product trading websites, such as Taobao, JD.COM and Kang Aiduo.
3. Check the information such as production date or batch number on the product label or packaging box, and judge the production age of the product by querying the rules of production date or batch number.
4. Go to a professional electronic product maintenance point or after-sales service center to consult the product age, maintenance history and other information, and get further confirmation.