What is iron stone, plum blossom, mountains and rivers and fragrant grass?

The meaning of this sentence is as follows:

"Iron stone plum blossom spirit, mountains and rivers, fragrant grass and romantic" means that people's character is as firm as a rock, and they are not afraid of severe winter and cold as plum blossoms. People's personality is as tall and straight as mountains and rivers, as noble and pure as vanilla.

It depicts the beauty of human character and behavior. Iron stone and plum blossom symbolize unyielding and tenacity, while mountains and rivers and fragrant grass symbolize nobility and beauty. People should be as strong and unyielding as stone plum blossoms, and as noble and beautiful as mountains and rivers and vegetation.

The cursive banner from Wang Chong, a calligrapher in the Ming Dynasty, is "the spirit of iron stone and plum blossom, and the mountains and rivers are full of flowers".