YZY: Yizhiyu, a China located platform for many KPOP albums and merches. They carry Chinese exclusivities and Lucky draws besides normal products. 

Chinese Exclusivities: The products which are released only in China. 

PB / POB: Preorder benefits. The items are preorder, need to wait for sewing time, and include special items only available during this phase. 

Lucky Draw: The merch comes with special card, photocard, mini card or other things which are not revealed in the product information.