In Jixi County, Anhui Province, there is a Longxu mountain scenic spot with wonderful scenery. It has more than 20 large and small mountain peaks, odd pines, ancient trees, strange rocks, waterfalls, pools, stone cities, stone caves, Longtai, Chan yuan and academy. The layout is natural. However, Longxu mountain is famous for its Gracilaria, which is about 1 meter long, slender, flexible and elastic.
Eulaliopsis binata is the main raw material for making chengxintang paper. The precious chengxintang paper, known as "Millennium longevity paper, a treasure of the arts and forestry", is a tribute, which is loved by calligraphers and painters of all ages. Dignitaries of the imperial court took possession of chengxintang paper as their glory and competed to collect it. According to media reports, there is a book named luoshenfu written by chengxintang paper. A single chengxintang paper is worth tens of thousands of yuan. Because chengxintang paper is now out of production.
In the Tang and Song Dynasties, there was a "Yilin Temple" 10 kilometers away from the county seat, which gathered many literati and scholars. They studied ink and paper making technology, and engaged in copying the steles of calligraphy saints. The steles developed by Chengxin hall are the treasures of the world. According to the Song Dynasty Su Yi bamboo slips, the method of making chengxintang paper is to soak the raw materials in a long boat, and then to smoke them in a big way instead of on the wall. From the beginning to the end, it is as uniform as one. "
Some of the masterpieces of Li Yu, the empress of the Southern Tang Dynasty, "asking how much sorrow you can have is like a river flowing eastward." are written on the paper of Chengxin hall. After Zhao Kuangyin destroyed the Later Zhou Dynasty, the later Shu Dynasty and the Southern Han Dynasty, the later leader Li Pianan Jiangning mansion (now Nanjing) also had a paper collection room of chengxintang. Later generations mistakenly thought that chengxintang paper was produced in Nanjing. It is said that Li Houzhu appreciated chengxintang paper and had a special liking for it. He also had the stubbornness of not writing on chengxintang paper.
Today, on Longxu mountain, there are luxuriant and verdant plants of Gracilaria. It's not a great pity that visitors can't see the long lost paper of Chengxin hall.