Ruyao Tianqing Glazed Bowl during the Northern Song Dynasty

Ru porcelain, first fired in the middle of the Tang Dynasty and famous in the Northern Song Dynasty, is one of the "Five Famous Porcelains" of the Song Dynasty. It is named after its production in Ruzhou City and has formed a prosperous scene of "a hundred mile landscape on both sides of the Ru River, with continuous fires everywhere". It occupies a significant position in the history of Chinese ceramics. The sky blue glazed porcelain of Ru porcelain contains agate in its glaze, with a green and lustrous color. The glaze juice is plump, smooth, and shiny, like a pile of fat. It looks like jade, and the sound of clasping is like a fragrance. The texture is excellent, and there is a saying that "jade is better than jade". The color is elegant and natural, and it is known as "the rain breaks through the sky and blue clouds break through".