When the Bao people, who are in charge of the tanning work, knead the leather, they look at the leather from a distance, and it should be as white as the flowers of grass and reeds; Hold it with your hand before entering, it should feel very smooth, and roll it up tightly, neatly and not obliquely; Look at the seams of the two skins on the leather, which should be thin and narrow; Look at the thread where it is stitched, and hide it from it.

The leather should be as white as the flowers of the grass and reed, and it should be cleaned quickly, and the leather should not be put into the water for too long, so that it will be tough; The leather is stretched very straight, which means that the leather texture is very positive; When stretched, it is skewed and not straight, because when stretching, it is tight on one side and loose on the other.

If you tighten it and loosen it when you stretch it, it will break from the tight side when you use leather. If it breaks first from the tight side, it will make the wide leather narrower instead. Roll the leather tightly without skewing, which means that the thickness is even; If you see that the leather seams are thin and narrow, the leather will not expand and deform; See that the stitches on the leather are hidden, and even if the leather is broken, the stitches will not be damaged.

韗 (yùn) people make Gao pottery, 6 feet 6 inches long, each piece of wood that makes up the drum body is 6 inches wide at the left and right ends, 1 foot wide in the middle and 3 inches thick, the middle bulge is one-third higher than the diameter of the drum surface at both ends, and the woodblocks on the drum frame are folded into straight 3 sections. The length of the drum is 8 feet, the diameter of the drum surface is 4 feet, and the circumference of the middle section of the drum body is increased by one-third compared with the circumference of the drum surface. The drum is 12 feet long, the diameter of the drum surface is 4 feet, and the drum waist is curved like a chime. Whenever you are in the drum, you must be on the day of the drum. The traces of paint on the skin of the good drum are like a ring. If the drum surface is large and the drum body is short, the sound will be rapid and short; The drum is small and long, and the sound is soothing and long-lasting.

Painting things, as well as the mixing of five colors. The symbol of the east is called cyan, the symbol of the south is called red, the symbol of the west is called white, the symbol of the north is called black, the symbol of the sky is called xuanse, and the symbol of the earth is called yellow. Blue and white are the 2 bell colors in order, red and black are the 2 bell colors in order, and Xuan and yellow are the 2 bell colors in order.

The combination of cyan and red is called wen, the combination of red and white is called zhang, the combination of white and black is called 黼 (fǔ), the combination of black and cyan is called 黻 (fú), and the combination of colorful is called embroidery. The land is painted with yellow, and its image is painted square. The sky is painted according to the changing colors of the four seasons, the fire is painted with a ring as a symbol, the mountain is painted with a roe deer as a symbol, the water is painted with a dragon as a symbol, and there are also birds, beasts, snakes and so on. Mixing the five colors that symbolize the four seasons to make the colors bright is called skill. When painting, white is worn at the end.

When Chung dyes his feathers, he soaks the dansa in water with the red millet used as a dye for 3 months, then steam it with fire, then pour the red millet with the water from the steamed red millet, and then steam it again, and then use the water from the steamed red millet to dye the feathers. The feathers are dyed pale cyan 3 times, black and reddish 5 times, and black 7 times.

Arashi boiled the silk and silk to make it soft and white, first soaked the silk in warm water for 7 days, and then exposed it to the sun 1 foot from the ground. Exposed to the sun during the day and suspended in well water overnight at night, after 7 days and 7 nights, this is called 水湅 (liàn). When the silk is burned, the fence wood is burned into ashes, then mixed with water, poured thickly on the silk, put it into a smooth container, and then the ash made from the mussel shell is smeared on the silk.

In the morning, clean the ash burned by the clam shell on the silk, and then wring it out, after shaking off the fine ash, pour more ash water on the fence, then clean and wring it out, and coat the ash burned by the clam shell, so that it stays overnight; Wash and wring out again the next day. After 7 days and 7 nights in this way, it is called gray 涑 (sù). Exposed to the sun during the day and suspended in the well overnight at night, after 7 days and 7 nights, it is called Shuixiang.

The jade man is in charge of making jade. Zhengui is 1 foot 2 inches long and is guarded by the Son of Heaven; The order is 9 inches long, called Huan Gui, and is guarded by the public; Ming Gui is 7 inches long, called Xingui, and is guarded by Hou; The life is 7 inches long, called bow, and is guarded by Bo. The jade turtle held by the Son of Heaven, 4 inches square, was used to receive the princes of the coming dynasty.

The Son of Heaven used pure jade, the dragon with a quarter of the stone for Shanggong, the Hou with half of the stone, and the Bo with half of the stone (liè). When he met the Son of Heaven, Lone, who was standing behind the son, held a bundle of five silk pieces decorated with leopard skins as a gift for the engagement. The Son of Heaven has a ribbon tied in the middle. Each of the four guis used to worship the heavens is 1 foot 2 inches long, and is used to worship the heavens.

Dagui is 3 feet long, the upper end is shaved inward on both sides, and the head is like a vertebral head, and the Son of Heaven is inserted in the waist. The soil is 1 foot 5 inches long, and it is used to measure the shadow of the sun and measure the land. The naked gyu is 1 foot 2 inches long, with a spoon at the front, and is used to worship the Jongmyo Temple. Wan Gyu is 9 inches long and has a colorful mat to symbolize virtue. 琰 (yǎn) is 9 inches long, with sharp corners at the top and semicircles on both sides, and is used as a proof of being ordered by the king to kill treacherous and rebellious people, and to change the harsh and cruel decrees of the princes.

The diameter of the bi is 1 foot long, and the diameter of the middle aperture is 3 inches, which is used as the standard length of 1 foot. It is 5 inches in diameter and is used to worship the sun, moon, stars, and stars. The side length of the jade cong is 9 inches, and the diameter of the bi is 9 inches, which is used by the princes to offer to the Son of Heaven when they meet the Son of Heaven. Gu Gui is 7 inches long, and the Son of Heaven uses it to give a dowry to the woman who is going to be married.

Dazhang and Zhongzhang are 9 inches long, the side zhang is 7 inches long, the sharpened part is 4 inches long and 1 inch thick, there is a brass spoon at the front end of Zhang, the outside of the spoon is coated with lead, the inside of the spoon is vermilion, the spoon is 1 inch long, the diameter of the spoon is 4 inches, and there is silk decoration. The Son of Heaven patrols the world, and when the mountains and rivers pass through the sacrifice, the Great Zhu uses Zhangzhan to perform the dowry before killing the horse and sacrificing the mountains and rivers.

The length of the ornamented Gui and Zhang is 8 inches, and the diameter of the ornamented bi and the length of the side of the cong are 8 inches, which were used by the princes to salute the king or the bride price. The Yazhang and Zhongzhang are 7 inches long, and the sharpened part is 2 inches long and 1 inch thick, which is used to send troops and mobilize the troops stationed. 驵 (zǎng) is 5 inches long on the side of the jade, and the queen used it to make a hammer to balance the scales.