电 (diàn): Electricity, electric, electronic. Originally a pictogram of lightning from a cloud, representing a powerful, instantaneous force.
子 (zǐ): Child, son; often used as a noun suffix for small things or in technical terms. Here, it combines with 电 to form 电子 (diànzǐ), the modern word for “electron” or “electronic”.
榨 (zhà): To press, to squeeze, to extract. This character depicts the process of extracting oil or juice.
菜 (cài): Vegetable, dish, cuisine.
The characters combine to create a vivid modern metaphor. 电子 (diànzǐ) places the term squarely in the digital age of smartphones and apps. 榨菜 (zhàcài), a real-life pickled mustard tuber, is a humble, common, and flavorful food item that adds taste to a plain meal. Together, 电子榨菜 means “electronic pickled side dish”—a perfect description for digital content that serves as a light, flavorful companion to the main event of eating.