Why We Love 안전놀이터 (And You Should, Too!)
http://hectoromzd195.timeforchangecounselling.com/become-an-expert-on-meogtwigeomjeung-by-watching-these-5-videos
You can try to trade a card with another player. The purchase of a single card can be a good method to gain an edge over the other player. Although trading can give you more cards, it's not always the most effective