1. Six countries chemical industry (600470).

2. Wen Yi Science and Technology (600520).

3. Tongling Nonferrous (000630).

Six chemical industries: chemical fertilizer (including nitrogen fertilizer, phosphate fertilizer and potash fertilizer), fertilizer (including compound fertilizer, compound fertilizer, water-soluble fertilizer, blended fertilizer, slow-release fertilizer, biological fertilizer and organic fertilizer), chemicals (including refined phosphoric acid, phosphate, urea phosphate for vehicles, urea phosphate, iodized salt, magnesium hydroxide and daily chemical products), and chemical raw materials (including anhydrous hydrofluoric acid, inorganic salts and daily chemical products) Sales and online sales of coal, ore, cotton and agricultural machinery.

Extended data

Tongling, also known as Copper Capital, is a provincial-level city of Anhui Province, a national forest city and an excellent tourist city in China. It is known as "the ancient copper capital of China and the contemporary copper base".

During Xia and Shang Dynasties, Tongling belonged to Yangzhou. The history of copper mining and metallurgy in Tongling began in Shang and Zhou Dynasties and flourished in Han and Tang Dynasties, which lasted more than 3,500 years. 197 1 Tongling Special Zone was changed to Tongling City, which belongs to the province directly under the central government. Tongling belongs to subtropical monsoon climate, with famous scenic spots such as Days Mirror Lake, Jinniu Cave and daming temple. The surface water in Tongling City is mainly the Tongling section of the Yangtze River, and the groundwater is mainly phreatic water in alternate zones, which is replenished by precipitation. The territory is famous for its nonferrous copper deposits, and the mineral deposits 1 15 have been discovered.

In the ninth year of Baota in the Southern Tang Dynasty (95 1), Yi 'an County was changed to Tongling County, and the county administration was moved from Shun 'an to Gutongguan Town, which is now the Chengguan Town where Tongling County is located. At this point, the place name of Tongling appeared for the first time in history. There is no formal written record of the origin of the word "Tongling". There are three versions: one is the "copper-producing mountain", so it is a hilly area, hence the name; Second, "copper production originally belonged to Nanling", so it was named "Tongling"; Third, "the copper land originally belonged to Lingyang", and Tongling area belonged to Chungu County and Lingyang County of Danyang County in the Han Dynasty, taking the mausoleum of Lingyang as Tongling.