The Yalu River has a wide surface, excellent water quality and no chemical pollution. It is very suitable for the growth and reproduction of animals and plants. Due to the unique natural environment of Ji'an City and the excellent water quality of Yalu River, the salted duck eggs processed by Ji'an Yalujiang ducks have unique product characteristics. Ji'an Yalu River salted duck eggs, salted duck eggs are evenly sized, the air chamber is small, the protein is liquid, sticky, and the egg yolk is fully bulged. After the cooked salted duck eggs are shelled, the protein is intact, fine and elastic, non-sticky, and has no "honeycomb" phenomenon. The egg yolk is firmer and oily.

I. Geographical characteristics of the production area of ​​the city The city is located on the banks of the Yalu River in the south of Changbai Mountain. It borders on the Yalu River in the south and borders on North Korea in the south. It borders on Kuandian County and Huanren County in Liaoning Province, and the northeast and Linjiang City and Tonghua City. Connected, known as the "Saibei small Jiangnan". The middle and low mountains and hills in Ji'an City account for 93% of the total area, with an average elevation of 812 meters, the highest altitude of 1516 meters and the lowest altitude of 108 meters. It is 80 kilometers long from east to west and 75 kilometers wide from north to south, with a total area of ​​3354.9 square kilometers. The old mountain range traverses the city of Ji'an, which is divided into the Lingnan Ridge, and its branches overlap and spread throughout the whole territory. The Yalu River originates from the Tianchi Lake in Changbai Mountain and is the boundary river between China and North Korea. The river is clear and green, and the color is like the green feather on the neck of the male duck, hence the name Yalu River. The state has two large hydropower stations on the Yalu River in Ji'an City: Yunfeng Hydropower Station and Tiger Whistle Hydropower Station, forming two large reservoirs of several hundred square kilometers. Ji'an has abundant rainfall and mild climate. The Yalu River has a wide surface, excellent water quality and no chemical pollution. It is very suitable for the growth and reproduction of animals and plants. Third, the relationship between human factors (a) physical and chemical characteristics of the product set of Ahjiang Lujiang salted duck eggs physical and chemical indicators are as follows: water 60% ~ 68%; total fat ≥ 12.0%; salt (calculated as sodium chloride) 2.00% ~ 4.00% ; volatile base nitrogen ≤ 10%; selenium 0.10 ~ 0.40mg / kg; zinc 1.5 ~ 5.0mg / kg; fluorine ≤ 1.0mg / kg; copper (mg / kg) ≤ 5; mercury, lead, arsenic, chromium, Cadmium, BHC, DDT, tetracycline, chlortetracycline, oxytetracycline, furazolidone, sulfonamides, Salmonella, Shigella, Staphylococcus aureus, and hemolytic streptococcus were not detected. (B) sensory quality characteristics (1) Appearance: eggshell clean and complete, no mildew. (2) Morphology: The size of raw salted duck eggs is uniform, the weight of a single piece is ≥60 grams, the air chamber is small, the protein is liquid, sticky, and the egg yolk is completely bulged. The cooked salted duck eggs are intact, fine and elastic, non-sticky, and have no "honeycomb" phenomenon. The egg yolk is firmer and oily. (3) Color: The egg yolk is slightly red or reddish, the salted duck egg protein is light and transparent, and the cooked salted duck egg protein is white. (4) Odor and taste: It has the inherent aroma and taste of salted duck eggs, moderate saltiness, delicious egg yolk and fine protein. (5) Destruction rate: damage rate ≤ 7%. (6) Inferior egg rate: Inferior egg rate ≤ 1%. (III) Status of water resources in the producing area The Yalu River originated from Tianchi, Changbai Mountain, Jilin Province, and flows through Changbai, Ji'an, Kuandian, Dandong and other places, and injects into the Yellow Sea to the south, with a total length of 795 kilometers. The Yalu River is loved by the Chinese and Korean people for its clear, green, pure and pollution-free water. Among them, the length of the water flowing through the Ji'an area is about 202.5 kilometers, the drainage area is 3312.8 square kilometers, and the total water resources is 772.6 million cubic meters. The average annual flow of the Ji'an section of the Yalu River is 240m3/s, and the average flow during the dry season is 180 m3/s. The water is abundant and does not freeze all the year round. Here, the river is wide, the water quality is excellent, the resources are abundant, and there is no chemical pollution. The river is rich in plankton, which provides good water resources for the breeding of the Ya'an ducks. (IV) Climatic conditions of the producing area Ji'an City is a subtropical continental monsoon humid climate with four distinct seasons, sufficient sunshine and abundant rainfall. The annual average temperature is 6.5 °C, and the annual precipitation is 1000 mm. The frost-free period is longer, generally around 150 days, and the average annual sunshine hours is 2228.2 hours. The area along the Yangtze River in the south is the hot and rainy zone of Jilin Province. The spring breeze is early, the autumn frost is late, and the climate is very pleasant. The gift of nature provides a good climatic condition for the breeding of flora and fauna on the land of Ang. (V) Ji'an City Yalujiang Duck Industry Status Ji'an City has a long history of duck farming, and duck farmers have accumulated rich experience in raising ducks. In order to speed up the industrialization process of duck industry in Ji'an City, in 2001, Ji'an City Animal Husbandry Bureau applied to the Ministry of Agriculture for the construction project of Ji'an Yalujiang Duck Science and Technology Demonstration Field and received project support. Since the implementation of the project, it has achieved good results in the past three years. It has developed and expanded the duck industry, and its products are in short supply. At present, there are more than 50,000 ducks in Ji'an Yalu River, and at least 100,000 ducks can be raised in the Yalu River waters of Ji'an City, which has great development potential. (VI) Humanistic characteristics of the place of origin The city is located in the southernmost part of Jilin Province, with a total area of ​​3354.9 square kilometers and a total population of 232,000. It has 11 townships, 3 sub-district offices, 126 administrative villages and 27 communities. Ji'an City is one of the three major ports of China's DPRK, and is a world cultural heritage site, an excellent tourist city in China, a famous historical and cultural city in China, a national-level ecological demonstration zone, and a demonstration city for green food development and construction in the province. Ji'an has a good ecological environment and abundant natural resources. It is known as “Jilin Xiaojiangnan” and “National Ecological Park”. The Yalu River Basin in Ji'an City is surrounded by mountains and has a unique natural barrier. There is no pollution source in the upper reaches of the water, the river is clear, fish and shrimp and plankton are abundant, which is very suitable for the development of duck farming. The duck eggs produced by Ji'an Yalujiang Duck are large in size, the egg yolk is bright red, the protein is fresh and tender after pickling, and the egg yolk and red sand oil are rich in taste, which is very popular among consumers. At present, Ji'an Yalu River salted duck eggs are in short supply in the domestic market and cannot satisfy the needs of consumers. In recent years, the disease resistance, egg production and quality of Ji'an Yalujiang duck have improved. The Ji'an Municipal Government invested a large amount of money in the cultivation technology, epidemic prevention technology, and epidemic disease monitoring to ensure the healthy development of the duck industry.

Technical requirements for quality of salted duck eggs in Ji'an Yalu River (1) Requirements for raw materials and auxiliary materials. 1. Duck farming: The breed of duck is a local duck. The feeding environment of the ducks, the feeding process, the use of feed and feed additives, and the use of veterinary drugs should comply with the relevant regulations of the state for the production of green food. The prevention and control of breeding environment and epidemic diseases must comply with relevant state regulations and must not pollute the environment. 2. Raw egg: Use fresh eggs that are no longer than 7 days produced by local ducks that are stocked on the Yalu River in the Ji'an section. 3. Salt: meet the requirements of relevant national regulations. 4. Water: Meet the requirements of relevant national regulations. (2) Processing technology. 1. Process: egg selection → lamp photo → cleaning → pickled → finished product → packaging. 2. Key processes: (1) Boiled water: Heat the water to boiling for 5 minutes and cool for later use. (2) Add salt: Add salt to the water and prepare a saturated solution. (3) Cleaning: The selected raw eggs are washed. (4) Pickling: Put the cleaned raw eggs into the cooled brine, the ambient temperature is controlled at 15 ° C to 20 ° C, and pickled for 30 to 35 days. (5) Packing: Wash and dry the salted duck eggs that have been marinated and vacuum-sealed. (3) Quality characteristics. 1. Sensory characteristics: raw salted duck egg protein is clear and transparent, sticky. The cooked salted duck egg protein is delicate and white and elastic. Raw salted duck egg yolk has a three-dimensional effect. Cooked salted duck egg yolks contain more oil. The proportion of egg yolk is large, and the color is dark red or apricot red. The palate is pure, moderately salty and has a unique umami taste. 2. Physical and chemical indicators: single weight ≥ 70g; moisture 60.0% to 68.0%; total fat ≥ 12.0%; salt (calculated as sodium chloride) 2.0% to 4.0%; volatile base nitrogen ≤ 10mg / 100g; 1.0 mg / kg; copper ≤ 5 mg / kg. 3. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

Apply to：
Producers within the scope of protection of Ji'an Yalu River salted duck egg geographical indication products may apply to the Ji'an City Quality and Technical Supervision Bureau of Jilin Province for the use of the “Special Mark for Geographical Indication Products”, which is reviewed by the Jilin Provincial Bureau of Quality and Technical Supervision. The General Administration of Inspection and Quarantine announced the approval. The statutory testing agency for Ji'an Yalu River salted duck eggs is designated by the Jilin Provincial Bureau of Quality and Technical Supervision.