The document provides a comprehensive guide on how to plant pechay (Chinese cabbage) using hydroponic methods, detailing various systems such as water culture, reservoir culture, ebb and flow, and wick systems. It discusses the cultivation history of pechay, its significance in cuisine, and the requirements for successful hydroponic growth, including nutrient solutions and pH levels. Additionally, frequently asked questions address the feasibility of hydroponics for pechay, its growth duration, and preferred soil conditions.