Royals, literati and the mainstream of the society throughout the dynasties have shown their love for the five famous kiln porcelains of the Northern Song Dynasty. In the blue, there was a faint glow, only a few dozen pieces existed in the world, and Sotheby's took one, costing more than ten million yuan. In the Southern Song Dynasty, the "longquan kiln" celadon became mainstream, and it is also highly respected today. Many of the ancient porcelains are still shining with the nobleness of cyan glaze, and people's love for them is still one of the mainstream in the aesthetics of utensils. This statement is intended to explain:. ['Guanyao porcelain has a very high collection value.', 'Cyan has extraordinary aesthetic significance to porcelain.', 'Color determines porcelain value, not kiln mouth.', 'Porcelain has been loved by people since ancient times.']