Who hand-picked the blue of Ru Ci?

It is said that "Rain breaks the sky, so the color determines the future", because the Ru kiln at that time was exclusively used by the Song royal family, and when the kiln official fired Ru kiln porcelain and asked for its color, the royal family approved: "Rain breaks the sky, so the color determines the future." From then on, azure is the color name of Ru kiln porcelain. Another story is that Hui Zong, the emperor at the end of the Northern Song Dynasty, loved Ruzhou celadon. He once had a dream that it would be fine after the rain. He likes the color of the sky after the rain very much and asks to make porcelain. "The clouds break after the rain, and this color will make the future." I don't know how many craftsmen were stumped by Hui Zong's deliberate pursuit. In the end, the craftsmen in Ruzhou were better. Fired porcelain is made of agate, with delicate soil, hard bones, rich color, dripping into beads, mottled glaze, like Jin pear skin. There are hidden fine lines on the face, like cicadas and traces left by crabs, so it is called "pear skin, crab claws and sesame flowers". Ru Ci pursues the realm of "Excellence, freshness and naturalness", which is simple and honest, natural and simple, gentle and beautiful, and Jing Ya overthrew the romantic emperor who could not govern the country at once.