The romance of The Three Kingdoms Chapter 41:
"... I don't want to bump into Zhao Yun. He stabbed me with one gun and took the sword. When I saw the golden word "Song Qing" embedded in the target, I knew it was a sword. Cloud pulls out his sword, raises his gun, and then he breaks into the encirclement ... "Zhao Yun" ... is to pull out his blue sword and cut it, raise his hand, make it flat, and blood gushes. Kill all the generals and take the encirclement. "The green sword here, or called the rainbow sword.
Dai Zhen's Exam Notes and Che Shi: "gāng is the sage". "Dialect" Volume 9: "Cars ... from customs to the west are called' cars'." Qian Yi's notes are sparse: "My words are empty. Inside the hub, it is said to be inlaid with gold. " Wang Niansun's "Guang Shu Ya Certificate": "Those who are trapped in iron are called trapped". (Quoted from Chen Shi)
Sage and strong. Green, it is also powerful.
"When excavating the architectural sites of this period, some copper building components are often unearthed. This is the so-called "melody", or "golden melody" (melody bar). In the Zhou Dynasty, the mortise and tenon technology was still immature, so it was necessary to add stirrups to the joints of wood structures for reinforcement or connect them with wooden components. These textures usually have exquisite decorative patterns and are very decorative. Later, the wood structure technology improved, and it was no longer a necessity, but was preserved as a decoration and developed into a decorative enamel. " (Quoted from Discussion on Architectural History of China)