Poplar does not belong to Daxinganling area, poplar belongs to Hulunbeier Oroqen Autonomous Region of Inner Mongolia, and Daxinganling area belongs to Heilongjiang Province, which are two different ownership. Although the distance between the two places is very close, the climate temperature difference in different geographical locations is also different. Poplar has smaller relative temperature difference, longer sunshine time and milder climate than Daxinganling. Some melons and fruits have high sweetness when they are ripe, such as cantaloupe. . .