2. If you get it through the draft, rooms above 16 will generally be available.
3. Shopping malls buy S-star cards.
4. Players bid, and only the player with the lowest bid wins the bidder.
Free trade and equal exchange, the quality of players depends not only on the level, but also on the salary level. Players with basic salary are very popular.
6. Free trading, using tickets to buy players sold by other players.
7. Take part in the ladder competition. The higher the competition level, the better the player card you get.
Maybe that's all I can think of. I hope it helps you.