What waves are there on the blue and white porcelain cup?

The waves on the blue and white porcelain cup are a pattern. According to relevant data, the waves on the blue-and-white porcelain cups are a pattern, which is often used as a decorative pattern on porcelain, especially in Song, Yuan and Ming Dynasties. Wave patterns usually consist of zigzag lines, showing the ups and downs of sea water. The waves are mostly blue or green, mainly black.