The village on the side of Qamdo is behind the hillside, there is no forest stream, no one cultivates all year round, it is a barren place for laymen, but it is a treasure pot in the eyes of the wormwood merchants! Now can not be collected indiscriminately, every village is very protected, to follow the villagers team together, watching them lie down to dig pits, very hard, finally picked out the fresh insect grass, but also cherished.