Third, the infrastructure of Sandu Town.

Post and telecommunications facilities have been developed from scratch and gradually improved. 1April, 953, Sandu postal business office opened, which was the beginning of self-management branches in the county. 1959, Sandu post and telecommunications sub-office started confidential business, with 1 full-time confidential staff responsible for the delivery of confidential documents of Zixing Mining Bureau and other units. 1984 implemented the rural postman system and began to send and receive international registered letters. 1985 the municipal post office opened a philatelic business department in Sandu. 1998, the municipal post office established a mobile communication base station in Sandu. In July 2002, Sandu implemented the reform of delivery system, set up postal community service stations according to the division and population density, extended the delivery service, and basically delivered newspapers, letters and small parcels to households. 20 1 1 year has 1 branch offices, and the total postal business is 500,000 yuan;

Chenzhou-Sandu long-distance telephone circuit was opened at 196 1, and Sandu-Chenzhou single-channel carrier telephone circuit was opened at 1973. 1976, the telephone line from Sandu to Changsha has been opened. 1993, Zixing rural telephone entered an extraordinary development state, and Sandu sub-bureau opened 3896 EWSD program-controlled switches made in West Germany. There are 4 telecom enterprises and 6 service outlets; The total capacity of telephone exchanges is 40,000, with 5,425 fixed telephone users, and the telephone penetration rate is 40%; There are 7432 mobile phone users and 2642 Internet users. The annual telecom business income was 3.56 million yuan. Sandu cable TV station was built in 1993 and later changed to Sandu cable TV station; 1998 cable TV station with flat panel, now it is changed to flat panel area of Zixing Radio and Television Network Co., Ltd. .. 20 1 1 year with 1 sub-bureau, and the total postal business is 500,000 yuan; There are 4 telecom enterprises and 6 service outlets; The total capacity of telephone exchanges is 40,000, with 5,425 fixed telephone users, and the telephone penetration rate is 40%; There are 7432 mobile phone users and 2642 Internet users. The annual telecom business income was 3.56 million yuan. There are 9069 cable TV users, with a household rate of 78%.

In April, 195 1, Zixing County Sub-branch of China People's Bank set up a business office in Sandu, and in September, 1953, Sandu business office was changed to Zixing Coal Mine Sub-branch. 1984 Zixing County Sub-branch of Agricultural Bank of China set up a business office in Sandu. June 1952 China Bank of Communications set up an office in Sandu, and June 1954 China Bank of Communications was changed to China People's Construction Bank. Therefore, Sandu Office was upgraded to Zixing County Sub-branch of the People's Construction Bank of China, responsible for the investment management of fixed assets in coal mines. 1June, 966, Zixing CCB was cancelled. 1953, the county insurance company set up an insurance service station in Sandu. Sandu Town has fertile land and rich resources, mainly rich in bituminous coal. Planting: mainly producing rice, sweet potato, peanut, sesame and rape. Rich in fruits and vegetables, forests: dominated by fir, bamboo and camellia oleifera, and non-staple foods are famous for rice wine, cereal wine, sweet potato wine, shochu, Bailu wine, old wine, water wine, bad wine and paste wine. The quality and quantity of Sandu's specialty products not only meet the needs of local people, but also are sold in large quantities to other places. Strong economic production capacity not only promotes development and prosperity, but also promotes Zixing and Chenzhou.

The most famous is the inscription pepper. In summer and autumn, the soil around Beiji Township is dry, and there are contiguous peppers with umbrella-shaped plant height and high attendance rate. Some of its fruits are big, round and rich in meat. Because they are shaped like lanterns, they are called lantern peppers. Some are long and sharp, the longest is 30cm, and the heaviest is 100 g, hence the name of horn pepper. If the seeds are removed, wrapped with meat stuffing, fried in an oil pan, and sprinkled with seasonings such as onion, monosodium glutamate, soy sauce and raw flour, the color, fragrance and taste are better, and they often become the best products on the table. Horn pepper tastes spicy and slightly sweet, which is most suitable for frying peppers and has the effect of appetizing and strengthening the spleen. All the guests who come to Zixing will order this dish. There is a long history of planting peppers in Beiji Township. At the end of 1980s, the planting area reached 20,000 mu. However, due to the influence of hybrid pepper varieties, the large pepper varieties in Beiji County have not been purified and well protected, and now the planting area has decreased. Liu Hua Bay, located in Sandu Village, Sandu Town, is the best preserved ancient residential group in southern Hunan in Zixing City, with about 400 houses, covering an area of about 30,000 square meters (45 acres). It was founded in the Ming Dynasty and has a history of about 600 years. The whole building faces south, and the terrain is high in the east and low in the west. The distance matches from east to west. The lotus pond in front of the door is fragrant, the river is gurgling and the ancient trees are towering. There are three villagers' groups in Liuhuawan ancient residence, 100 households with more than 400 people. Most of the villagers are surnamed Yuan, and they are said to be descendants of Yuan Xueyuan, a general who conquered the south in the Tang Dynasty. According to legend, Liuhua Bay was originally named Liujiawan and belonged to Liu. After Yuan, the founder of Liuhuawan Village, bought Liu's property, he renamed it Liuhuawan according to the homonym, which means "long history and colorful". Liu Hua Bay is outstanding, with 12 scholars and 5 scholars. There is still a "Jinshi" plaque hanging on the front door of the old museum. The plaque is engraved with the gold-plated calligraphy of "Yuan, Daoguang B gave a scholar in the last year". Liu Hua Bay is not only the cradle of Zixing Red Revolution in China, but also a well-preserved ancient residential group in southern Hunan with a long history and profound cultural heritage. On March 17 (1928) 13- 16, the first party member Congress of Soviet government in Zixing County, China was held in Liuhuawan (the ancestral home of Yuan Caiqi, party member, China). At the meeting, it was proposed to implement the agrarian revolution, establish revolutionary armed forces and develop the party's grass-roots organizations. Liu Hua Bay took an active part in the revolution at that time, among which more than 40 young and middle-aged people took part in the Hunan riots and went to Jinggangshan. In 20 14, Zixing municipal party Committee and municipal government began to build Liuhuawan leisure tourism experience zone with Liuhuawan ancient dwellings as the core, which is the main undertaking place of Zixing leisure tourism experience, an important extension of Dongjiang Lake tourism and an important node connecting Huilong Mountain and Dongjiang Lake. On July 4th, 20 15, Sandu Town held the first Lotus Festival of China Dongjiang Lake, which was a complete success and attracted tens of thousands of tourists.

There is a wild Liquidambar formosana with the highest crown in Zixing City in Shangdong Village, DBH 1.4m, with a height of 36m, a crown width of 530m2 and a tree age of 200 years.

"Under Nine and a Half Ridges" refers to nine semi-natural villages under Zixing Chen Gangling, namely Huangchangling, Sanyuan, Shitouqiu, Longzui, Liuhuitang, Zhongshazhou, Xiabaojiachong, Hengchuntang, XiaXishan Ridge and Gebei, among which Gebei is the smallest, only half, so one * * is nine and a half. Although these nine semi-natural villages have their own names, they all belong to the same ancestor of Yuan and are very close to each other, so the locals collectively call them "Nine Ridges and a Half".

"Nine ridges and a half under the mountain" belongs to Chen Nan Village, Sandu Town. Most of the villagers in Chen Nan Village are Yuan family. The Yuan family began to build a village in the Song Dynasty, while Huang Changling came from the opposite Muguatang natural village. The exact age is not recorded in the genealogy. Yuan Dousheng, an old man who participated in genealogy compilation in the village, said that Huang Changling had an old name-Sishanchong before and at the beginning of the village. As for why it was later renamed Huang Changling, it should be auspicious! As for the village name of Stone Mountain, the villagers passed it on from mouth to mouth because a big stone suddenly appeared under the shrine when building a hall. Although the exact dates of these villages are unknown, the villagers are very sure of one thing, that is, the other eight semi-natural villages under the "Nine Ridges and a Half" all developed from Huangchangling Village. Therefore, Huangchangling is the birthplace of "Nine Ridges and a Half". According to statistics, there is an ancestral hall house, six horizontal halls and 105 ancient houses in Huangchangling, which are connected in a row with blue bricks and tiles. Entering the ancestral hall, I saw the ancient hall of Mitsui and Erjing, which was tall and majestic. Because it has just been renovated, it is clean and tidy. The wooden windows on both sides are carved with the Eight Immortals pattern, dragons, phoenixes, bats and other auspicious animals. The wooden columns, doors, windows and beams of the main hall were repainted, and the damaged places were repaired according to their original appearance, which made people less worried about the urgent need for protection. The villagers are most proud of the thick green slate in the yard, engraved with three circular patterns. The larger pattern in the middle is carved with fish and dragons on both sides, which means that carp yue longmen and Shuanglong grab pearls, placing their ancestors' hopes for versatility in the village. With the increase of population, three natural villages, Sanyuan, Gebei and Huangchangling, have been connected together, and houses have been built on the ponds and fields that were once separated, and the boundaries between these natural villages can hardly be seen. Moreover, the natural village under the Xishan Ridge gradually declined before liberation, and now it has disappeared, so nine and a half is actually eight and a half.

Chen Gangling is located in Chen Nan Village. Like a bell, the mountain is not high. The altitude is about two or three hundred meters. It is famous for its ancient academy-Chen Gang Academy. According to the inscription in the book of the Academy, the Academy was founded in the tenth year of Xianchun in the Southern Song Dynasty (1274), which was built by the ancestor of Yuan, and was used to "introduce the son to choose a scenic spot as a pavilion". Chenggang College (merged into Chengshui College in the seventh year of Xianfeng) was built in Yao Gang. It is said that before the Qing dynasty, as long as the drums were played on the hills, it was certain. In the late Ming and early Qing dynasties, it was a scene of Zixing, known as "Chen Ying". Yuan is the most popular name of Zixing. From the early years of the Northern Song Dynasty, Yuan's ancestors migrated to the foot of Chenglingling Mountain and gradually developed around Chenglingling. Up to now, there are 10 Yuan's ancient natural villages around Chenglingling, among which Muguatang Natural Village is the place where Yuan settled earlier and is called "the hometown of golden roosters" by local people. According to the records about the cemetery of Academy in Yuan Family Tree. He was originally from Runan, Wujiang County in the south of the Yangtze River (now a county in Anhui Province). After that, Tang worked as a scholar for three years and was awarded the post of Changsha governor. After the first year of Emperor Tang Ming, he was promoted to the magistrate of Chenyang. Due to years of turmoil, he resigned and moved to Chengjiangli, Xingning (now Zixing). His eldest son, Yuan Qiong (former Shangshu of the Ministry of Rites, bachelor of Wenyuange), retired and lived at the foot of Chenglingji Mountain, which is now the capital of Chen. The population of Chenglingji is mainly Han and Yao, who are most concerned about birthdays, especially National Day. They attach great importance to festivals, such as Spring Festival, Lantern Festival, Tomb-Sweeping Day, Dragon Boat Festival, Mid-Autumn Festival, Double Ninth Festival and Winter Festival. They mainly use wine for weddings, birthdays and funerals, followed by building houses. The "eldest son" and "second son" who pay New Year greetings, the "four respects" and "three respects" in the wine, the four respects are one respect for heaven, two respect for land, three respect for ancestors and four respect for elders, and the three respects are mostly one respect for heaven, two respect for land, three respect for ancestors, two respect for the elders of Gaotang and three respect for each other, and there are many meaningful farming arranged by the people according to the 24 solar terms.