What kind of flower is this? It has a big red flower. There are two different flower names.

Paeonia lactiflora (scientific name: Paeonia lactiflora) is a famous herbaceous flower of Paeonia in Paeoniaceae, which has double petals and single petals, and is native to China and northern Asia. It is listed as one of the six famous flowers in China. Paeonia lactiflora not only has high ornamental value, but also has quite important medicinal value. Paeonia lactiflora is called "Paeonia lactiflora" because of its charming flower shape and bright color.