candied dates, Polygonatum sibiricum and Gracilaria lemaneiformis, which are called "three treasures" in Lianzhou. Let's start with dates. Lianzhou has more than 6666 hectares of purple soil developed by red sand shale. This purple soil is loose and rich in phosphorus and potassium, which provides a unique condition for Lianzhou jujube production. Two streams rushing from the deep mountains moisten this fertile land for many years, and the rolling hills make jujube flowers fragrant. Farmers who work and live on purple soil have improved and domesticated jujube trees for more than 5 years. The oblong fresh jujube contains 22% sugar, and the round pile-shaped fresh jujube contains 31% sugar, and it is rich in sweet juice, crisp and soft, with thin skin and small core. China Native Products Dictionary calls it "the excellent material for making candied dates". The large-scale production of Lianzhou candied dates began in 1956. The production process of candied dates is fine, scientific and hygienic, including jujube selection, scraping, boiling, sugar refining, stuffing and twisting. Jujube should be selected with uniform particles, no insects, no spots and no damage, and the jujube skin has turned from green to white but not red and is close to maturity. Select the jujube and cut the jujube peel longitudinally with a row of needles (to facilitate the infiltration of sugar); Cook the dates in boiling water, then cool them with clear water to remove the green flavor, and then the candied fruit can be made. To make candied dates, pomegranate sugar produced in Jiangmen should be used, and syrup should be refined according to the proportion of 5 kg sugar and 15 kg water. When the syrup is refined to golden yellow, the jujube is cooked immediately, and it is boiled while stirring in slow fire until the jujube is yellow. After 12 hours, the twisted jujube is put on a dustpan and baked in a solar dryer, and then it can be bagged and packaged in stages. Lianzhou candied dates, with the trademark of "Pearl River Brand", were listed as national foreign trade export products in 1958 and exported to Hong Kong, Macao and Southeast Asian countries. In 199, "China Native Products Dictionary" included Lianzhou candied dates in the scope of national famous native products. Its simple and generous packaging highlights the rich customs of northern Guangdong. It is delicious, sweet and refreshing, is a typical Lingnan-style snack, and has the effects of nourishing, beautifying and inducing resuscitation. Besides Polygonatum sibiricum. Polygonatum sibiricum, a Liliaceae plant, likes to grow in the shade of Shan Ye, with delicate branches and stems, narrow lanceolate leaves, and cool white flowers axillary and graceful. Polygonatum sibiricum has the functions of strengthening spleen, moistening lung and benefiting kidney. As for its name, Li Shizhen, a famous doctor in Ming Dynasty, thought that it was "called Polygonatum because of its essence of Kuntu". Every spring and autumn, Lianzhou drug farmers go up the mountain to dig drugs. If you dig up Polygonatum, depending on its shape, you can call it "Polygonatum nodosum", "Polygonatum bletilla" or "Polygonatum cyrtonema". After the medicinal materials are purchased, they are steamed, dried, pulped and sun-dried. If so, they are brewed until they are black. Before it is wrapped in pink paper, it is the local product "Lianzhou Polygonatum". Lianzhou Polygonatum is marketed at home and abroad. Some people once thought that pink paper packaging was too rustic and switched to plastic paper packaging. As a result, there were few buyers. So the old packaging was used and sold as well as ever. In 199s, some wineries used glutinous rice, Polygonatum sibiricum and spring water to make Polygonatum sibiricum glutinous rice wine, which was in short supply. It is said that this wine was sent to the shopping mall of a hotel in the provincial capital, and the drinkers all said that it was a good thing. The shopping mall wanted to put it on the shelves for sale, but it was given up because of its cheap price. Finally, let me talk about Gracilaria lemaneiformis. On the purple hills and slopes around Xingzi Town and Dalubian Town in Lianzhou, there is a kind of wild plant. They are in clusters, like the beards of a dragon, fluttering gently in the breeze. This is the famous "Gracilaria lemaneiformis". Speaking of Gracilaria lemaneiformis, there is a fascinating legend circulating in the local area: In ancient times, after Huanglong, who loved his people as a son, became immortal, the Jade Emperor ordered him to ascend to heaven and seal the throne. The officials of the DPRK and the people of the Li people could not bear to let Huanglong go, holding his robes and his beards, and trying every means to retain him. But how can Huanglong disobey the destiny? Had to take off. As a result, the dragonflower crown turned into a purple mountain, while the dragon beard fell on the hillside and grew into green grass ... Gracilaria lemaneiformis is a perennial herb with strip leaves and small flowers. Purple soil has a very shallow soil layer, and the topsoil is easy to be taken away by rain. Gracilaria lemaneiformis takes root and grows in such a place, which plays a great role in protecting the ecological environment. Gracilaria lemaneiformis is also a high-quality raw material in the paper industry. Originally, Lianzhou Paper Mill used Gracilaria lemaneiformis as the main raw material to process the No.1 typing paper. This kind of typing paper has won the first place in the province's quality appraisal. The stems and leaves of Gracilaria lemaneiformis can also be used as hemp fiber, rope, straw sandals and so on. Therefore, some areas also call it grass or grass.