Wuthering Waves codes and how to redeem

Wuthering Waves codes are one of the easiest ways to get Astrite in the new Genshin-esque free-to-play RPG, plus a load of other free resources. What's Astrite you ask? Well, this is the premium currency which you use to pull for characters—or Resonators as the game calls them—letting you build and add powerful new fighters to your party. 

Though you can farm up Astrite by doing your dailies and completing quests, it makes sense to squirrel away as much as you can for when a character you...