To keep your bok choy fresh for as long as possible, make sure to store it in the crisper drawer of your fridge. It's like giving your bok choy its own little spa day - it'll stay fresh and happy for longer.
Wilting Bok Choy: Causes And Solutions | ShunCy
Also, try to keep it away from strong-smelling foods like onions and fish, as these can transfer their smells to your poor bok choy. You wouldn't want your favorite shirt to smell like last night's dinner, would you?