Flower name and planting technology?

Luwei flower, alias Ryophyllum, Portulacaceae; Luwei flower, native to the mountains of the central west coast of the United States. Flower talk is a fairy tale of love. The flowers are white, flowering from early spring to summer. Roots fleshy, leaves Obovate. The cold resistance is not strong. Like humid spring and dry summer environment. In humid climate areas, full light should be preferred. Suitable for fertile, deep sandy soil. To reproduce by sowing or dividing plants in spring. It is used in rock garden, and it is popular to be potted in recent years.