The Qinglong River Basin in the southern part of Lingyuan City is the largest provincial-level natural ecological protection area in Liaoning Province. It is well-suited for crop growth. In the area of ​​Tazigou in the reserve, there has been a thousand years of planting green onions since ancient times. Later, after 30 years of industrious 30-year-old farmers, the mother plants were planted, large ridges, deep ditch, and many high-cultivation, and finally selected. A new variety of excellent farmhouses. Because the variety is long and succulent, the pseudo stem is thick and firm, and the shape is like a wooden stick. The taste is tender and tender. The entrance is sweet and spicy, and the aroma is thick. The cuts of the fake bulbs are easy to spread after slitting, which is scaly, so the image of people is called For scales and onions. Because the variety was cultivated by the industrious 30-year-old farmers, it not only has a good taste, but also is resistant to cold and storage, so it is named after the 30-story scales.

The history of planting onions in Shijiazi Town, Lingyuan City, Liaoning Province is very long. Because the Qing army left 30 households and eight flag brothers in the area at the beginning of the Qing Dynasty, it was named 30. The local customs have been planting green onions since ancient times, but at that time, due to production skills, transportation and other conditions, the 30 large onions were planted in small areas and the yield was very low. Until the 50th year of Emperor Kangxi (AD 1711), Emperor Kangxi went to Shengjing (now Shenyang) to worship the ancestral mausoleum and went to the thirty-seat family along the mountain road. Looking at the 30 sons and the outstanding people, the scenery was beautiful, so the camp was ordered to be stationed in 30 houses, and the Chengyu Temple was built in the town center. When building a temple in the enclosure, it is necessary to eradicate a vegetable garden. Emperor Kangxi saw this green vegetable and asked what kind of crops he followed. The local official promised 30 family scales and onions. Kangxi曰: The people are not easy to grow, and they taste it. They feel that the entrance is sweet, slightly spicy, the taste is unique, and the appetite is greatly increased. Therefore, every meal does not leave 30 scales, even when driving back to Beijing from the 30th family, Local specialty products should not be used, and only 30 car scales and green onions are prepared. Can be recognized by the emperor, thirty of the scales of the onion will be in the name of the 0, the ministers of the DPRK have been sought after, and even to the point of "one or two silver and a green onion." Therefore, the local people gradually increased the planting area. By 1988, the area of ​​30 large green onions had expanded to 18,200 mu. Even in recent years, the government has focused on the greenhouse cultivation of greenhouse vegetables, but the planting area of ​​the 30 scales has not been reduced. Nowadays, the thirty-five scales are sold to Liao, Yi, Meng and Tianjin.

The technical requirements for the quality of the thirty-six scales and onions are as follows: Variety Local traditional local varieties "scales and onions". Second, the site conditions soil type is meadow soil, the texture is sandy soil, clay soil, soil thickness ≥ 50cm, organic matter content ≥ 1.2%, soil pH value 6.5 to 7.8. Third, cultivation management 1. Nursery: spring sowing seedlings and autumn sowing seedlings, 1.3 to 1.5kg per acre. 2. Colonization: When the seedlings are 30 to 40 cm high, 6 to 7 leaves, and 1.0 to 1.5 cm thick, they are planted from mid-May to early June. The planting density is ≤240,000 per hectare. 3. Fertilization: Apply high-quality organic fertilizer ≥60m3/ha. 4. Soil: At the beginning of August, the soil was started and it was divided into three times. The soil was cultivated every half month, and the height of the soil was ≥45cm. 5. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. 4. Harvesting begins in mid-October in the first half of the year, and the ground is aired for 2 to 3 days. V. Quality characteristics 1. Sensory features: crisp and firm onion, crisp and tender texture, soft and spicy, long and easy to disperse. 2. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to：
Producers within the scope of the 30-scale scale onion production area may apply to the Lingyuan Municipal Market Supervision Administration of Liaoning Province for the use of the \"Special Mark for Geographical Indication Products\", which is reviewed by the Liaoning Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine. Announced after approval. The inspection mechanism of the thirty-six scales and onions is selected by the Liaoning Provincial Bureau of Quality and Technical Supervision in the inspection institutions that meet the qualification requirements.