[Pre-booking lecture] refers to a product sold in advance at the lowest price before the lecture opens, allowing you to purchase it. For pre-booking products, lectures will be partially opened sequentially according to the schedule announced on the lecture detail page.
With one-time payment, you can access both the currently opened lecture content and the lectures to be opened later. Lectures are usually uploaded after 5:00 PM on each opening date, so please check the schedule and time for your reference. (Please note that the opening schedule may be subject to change due to unavoidable circumstances, and in such cases, we will notify you through the 'Notice' section in the online lecture hall.)