What kind of flower is this? It should be a rose bush.

This is plum blossom. Wheat grain (scientific name: gland cherry (Thunb. ) Louise. ): a deciduous shrub belonging to the genus Sakura in Rosaceae, with a height of 2 meters. The leaves are ovate-oblong to elliptic-lanceolate, 5-8 cm long, acute at the apex, usually round and obtuse, broadly cuneate at the base, with thin blunt teeth at the edge, hairless on both sides or sparsely ribbed on the back; Petiole is 4-6 mm long. The flowers are pink or nearly white, about 2 cm in diameter, and the pedicel is about 1 cm long. The fruit is nearly spherical, with a diameter of 1- 1.5 cm, and is red. Wheat and plum have certain cold tolerance, strong adaptability and love light. It is cold-resistant and adaptable. Very beautiful, widely cultivated and ornamental in gardens all over the country, suitable for lawn, roadside, rockery and forest edge clumping, and can also be used as materials for foundation planting, potted plants or flower forcing and cut flowers. Born on hillsides, ditches or bushes, it is also cultivated in gardens at an altitude of 800-2300 meters.