Historical skills of Valeriana amurensis.

Jia Gu originated in Qin and Han Dynasties and flourished in Tang and Song Dynasties. According to the historical records of Two Instruments, Jia Gu "existed between Qin and Han Dynasties, but I don't know why it was artificial". According to documents such as Tang Yulin's Original Story and Panshi Moon Hee's Talk, Liu Jieyu's sister "made the block print look like a mixed flower and a clip". Bai Juyi, a poet, once shouted, "Chengdu is a new family, Han Liang is a rouge breaker". In Louis in the Qing Dynasty, some young scholars sold pianos and swords in exchange for Jawar, which showed that it was expensive. In the history of the Song Dynasty, it even clearly recorded the imperial edict that "tourists and travelers are not allowed to publicize and sell Jia".

Javalle was once a popular printing and dyeing process in the Tang Dynasty, and Emperor Ming of the Tang Dynasty gave it as a national gift to the envoys of various countries. The colorful plastic bodhisattvas in Dunhuang Mogao Grottoes wear colorful clothes. At that time, colored printed and dyed colored clothes were made of silk. These physical fragments have been regarded as national treasures by world-class museums such as British Museum and Masakura Research Institute in Japan. Yuan, Ming and Jiagu were transformed into single blue, which was finally preserved in southern Zhejiang and radiated to Taizhou, Lishui and other surrounding areas with Wenzhou as the center.

Wenzhou has so far completely preserved the technological processes of engraving, indigo production, printing and dyeing. Lanjiawei dyehouse, which was originally distributed in counties (cities, districts) of Wenzhou, closed down one after another in the 1970s. A farmer in Cangnan, with the support of foreign businessmen, started a dyehouse, which has been operating intermittently since then, which has had a positive impact on the inheritance and protection of this skill. Taiwan Province han sheng magazine conducted a field investigation on Lanjiawa in 1997, and published a picture book of Jiawa, which announced to the outside world for the first time that the Jiawa process was still alive, which caused widespread concern in Lanjiawa in southern Zhejiang. The patterns and patterns of Jia Langu are mainly the local opera figures of Yongjia Kunqu Opera, Luantan Opera and Peking Opera, which are popular in the late Qing Dynasty and the early Republic of China, which are quite different from the multicolored Jia Gu, which is dominated by Ji Xiangwen such as flowers and birds in history. Excellent artists of blue clip flowers are often masters of folk operas, and their obsession and understanding of opera is an important reason for the formation of the pattern characteristics of blue clip flowers. In the late Qing Dynasty or the Republic of China, the pattern of the blue valerian was a drama, and a complete quilt cover of the blue valerian was a complete drama story. Graphic design has always been monopolized by two companies, because they are troupe owners, and others can only imitate their works.