Ru ware is a type of Chinese porcelain that was produced during the Song Dynasty (960-1279). It is known for its thin, delicate walls, delicate and subtle glaze, and intricate design. Ru ware was made in the kilns at Qingliangsi, near the city of Ruzhou in Henan province, and it is named after this location.

Ru ware is considered to be one of the finest and most highly sought-after types of Chinese porcelain. It was made using high-quality kaolin clay and fired at extremely high temperatures, resulting in a thin, translucent body that is highly resistant to cracks and chips. The glaze on Ru ware is thin and delicate, with a subtle, shimmering quality that is often described as "oily." The glaze is typically blue-green in color, although other colors, such as pink and yellow, were also produced. Ru ware was highly prized for its beauty and craftsmanship, and it was often used for important ceremonies and given as gifts to high-ranking officials.

Although Ru ware was produced during the Song Dynasty, it continued to be highly prized and sought after in later periods, and it has had a significant influence on the development of Chinese porcelain. Today, Ru ware is considered one of the most valuable and collectible types of Chinese porcelain, and it is highly sought after by collectors and connoisseurs around the world.