What's the difference between Song and Yuan landscape paintings?

Most of the landscape paintings in the Song Dynasty are made of silk, with fine hook work and rigorous description, while they are rendered layer by layer with ink, dignified and quiet. Paper used for landscape painting in Yuan Dynasty is beneficial to dry brushwork. "Not bound by law, but the meaning goes beyond the image." Ink painting is dry and wet, unpredictable and vast. It can be said that China's landscape painting techniques, harmonious Song and Yuan Dynasties, have achieved great success. After Yuan, Ming and Qing Dynasties, landscape painting was obviously not as good as Song and Yuan Dynasties, and there was no heavy sense of history and culture in Song and Yuan Dynasties. For reference.