I have seen this flower, it is the Jindalai flower

Jindalai--the flower of auspiciousness

Jindalai is also known as the infinite flower. In fact, It is a rhododendron of the Rhododendron family and a rhododendron of China.

The flower language of Jindalai is a flower that blooms for a long time.

It is also the national flower of South Korea. Koreans use it to symbolize long-term prosperity, joy and happiness. During festivals or when guests from far away come to visit, Koreans will place Jindalai at home. When the guests are about to leave, they will also present Jindalai or Jindalai embossed bookmarks to the guests