1. Because asparagus contains oxalic acid, it has a bitter taste. Bitter asparagus can be eaten after blanching. Blanching can remove most of the oxalic acid and bitter substances in asparagus, and it can also retain vitamins to the maximum extent and avoid a large loss of nutrients.

2. Asparagus is the seedling of Asparagus, a perennial herbaceous plant of the Asparagaceae family, which can be eaten as a vegetable. The white ones that are not unearthed are called white bamboo shoots, and the green ones that are unearthed are called green bamboo shoots.