cooking.nytimes.com
The classic Chinese way to clean shrimp and ensure a succulent flavor and crisp texture, says Grace Young, author of “Stir-Frying to the Sky’s Edge,” is to use a combination of salt and water, either dousing the shrimp in two rinses of heavily salted water or rubbing the shrimp with salt, then rinsing with water. If you don’t eat salt, then just rinse the shrimp with plain water. I recommend bunch spinach for this; you don’t have to stem it, just cut away the base of the leaves and rinse well.