Spinach tofu, one green and one white, is delicious and beautiful when cooked, especially suitable for the elderly with bad teeth. According to legend, when the Qing emperor traveled incognito to the south, he ate a very delicious dish in the home of 100 people. After he returned to the palace, he had to do this and named it "Ying Ge Red-billed White Jade Board", which is the most common spinach tofu. In fact, it is unscientific for them to cook and make soup together.

Judging from their ingredients, tofu contains magnesium chloride and calcium sulfate, while spinach contains oxalic acid. In the process of cooking this dish, when these substances meet, they will produce substances that the human body cannot absorb, namely magnesium oxalate and calcium oxalate. If this substance cannot be excreted in time after intake, it will affect health, especially for patients with nephritis or people with poor renal function. So it is best not to stir-fry tofu and spinach.