What kind of flower is this? It belongs to Changji, Xinjiang. I haven't seen it since I first came here!

The following Solidago canadensis is Baidu Encyclopedia:

Solidago canadensis L.: It is a compositae plant of Campanulaceae, also known as oriole and Eucheuma. Perennial herbs with long rhizomes. The stem is erect and 2.5 meters high. Leaves lanceolate or linear lanceolate, 5- 12 cm long. The head is very small, 4-6 mm long and grows on one side of the inflorescence branch. Most curved inflorescence branches and flower heads are planted on one side to form an expanded panicle. Involucre linear-lanceolate, 3-4 mm long. Tongue-shaped flowers with short sides.

The flower shape and color of this plant are very bright, and it is often used for arranging flowers. 1935 was introduced to China as an ornamental plant, and it is an exotic creature. Weeds escape after introduction and are malignant weeds. It mainly grows around floodplains, wasteland, roads, farmland and rural houses. It is a perennial plant with developed rhizome, strong reproductive ability, rapid spread, obvious growth advantage and wide ecological adaptability. It competes with the surrounding plants for sunlight and fertilizer until other plants die, thus posing a serious threat to biodiversity. It can be said that nothing grows in yellow flowers, so they are called eco-killers and Lady Enforcers. Included in the list of alien invasive species in China (the second batch). (Overview picture [1])