1, because it contains a lot of oxalic acid, oxalic acid concentration is high when the bitter taste.

2, processing methods: as long as you remove the skin, it is best to cut into slices in a pot, soaked in water for a day or two, remember to change the water yo! If you are in a hurry to eat, then boil the water before cooking, put the bamboo shoots into the boil for a while, and then fish out and rinse, and then cook again will not be bitter.