According to the food science and technology network, it's best to blanch asparagus, because asparagus contains oxalic acid, and direct frying without blanching will have bitter taste. Too much oxalic acid will form calcium oxalate with calcium, so it's best to blanch asparagus before eating.

Asparagus, also known as exposed bamboo shoots, bamboo shoots and so on, is widely distributed. Asparagus is cultivated in many countries in the world, such as China, German, Japanese, American, French, Spanish and Peru. Among them, China is the largest producer of asparagus in the world, Peru is the second largest producer, and Germany is the third largest producer.