Education Exhibition Network is the master agent of Global Online School. All listening cards (study cards) on this website are formal cards of Global Online School and can be used to purchase all courses offered by Global Online School. Study cards of various denominations can be combined at will (currently available card denominations are 1000, 500, 300, 100, 50, 30, 20, and 10). For example, if you need a 450 yuan listening card, you can purchase a 300 card and a 150 card for top-up. After purchasing the Global Online School study card, you can activate your course through two methods: Course Selection and Payment Process: Purchase Card for Self-activation or Course Selection and Payment Process: Purchase Card for Proxy Activation. For more usage help, please refer to the "Frequently Asked Questions" section at the bottom or consult online customer service. Contact QQ: 858440262, Contact Phone: 13723764855, Taobao Address: http://51xuexika.taobao.com