Dingma turtle has a long history. According to the records of Qingping County, the original Majia Lake in Dingma Village of Qingping County is rich in soft-shelled turtles. From 923 to 947, the Emperor Li Yuyuan of the late Tang Dynasty, Shi Jinglian, the emperor of the late Jin Dynasty, has been stationed here for several years, with more than 10,000 soldiers. However, there are very few people suffering from local people. Inquire about the plague in the Majia Lake, and catch the plague. The lyrics are quick and easy to understand. The Lijiayuan 谕 Majiahu turtle is a "holy scorpion". Since then, the Majiahu turtle has been protected for generations, and the artificial breeding management has been strengthened, which has become a palace tribute. Because of the number of soldiers and military horses stationed in the past few years, Dingma got its name, and the Dingma turtle was famous for it.

Technical requirements for quality of squid turtles (1) Source of seedlings. It is sourced from the provincial-level Chinese sturgeon seed farm of Shandong Dingma Biotechnology Co., Ltd. (2) Production technical requirements. 1. Pond requirements: The shape is rectangular, the slope ratio is 1:2.5, the escape wall height is greater than 0.9m, the culture water surface is 4800m2 to 5400m2, and the water depth is 1.2m to 1.6m. 2. Environmental and soil requirements: The environment is quiet and there is no industrial pollution. The water source is sufficient, and the water quality meets the requirements of GB 11607. The soil quality conforms to the soil quality standard of the national pollution-free Chinese sturgeon production site. The air quality complies with the air quality standards of the pollution-free Chinese sturgeon production site specified by the national GB 3095. 3. Water quality requirements: The culture water must be blended with the Yellow River water and groundwater, and the water quality meets the pollution-free Chinese sturgeon production water standard. pH 7.2 to 7.6, dissolved oxygen 4 mg/L to 12 mg/L, total hardness 70 mg/L to 79 mg/L, transparency 25 cm to 30 cm. The Qingtang disinfection uses 200ppm of quicklime and the whole pool is evenly splashed. The water quality adjustment is repeated every 60 months with 60ppm of quicklime or 0.5ppm of povidone iodine, and the water is periodically replaced to make the water quality relatively stable. 4. Breeding density: The seedling size is 450 g/500 g/only, and the density is 1/m2 to 2/m2. 5. Feed requirements: The quality of artificially formulated feed meets the requirements of GB 13078 and NY 5072, and strictly abides by the Regulations on the Administration of Feed and Feed Additives (Order No. 266 of the State Council [1999]). Regularly add Chinese herbal medicines and micro-ecological preparations to the feed to enhance the immunity of the turtle to avoid the disease. 6. Daily management: strictly follow the farming technical operation rules, feed the bait and patrol the pool twice a day to keep the breeding environment clean and hygienic. 7. Feeding time: 100 to 120 days. (3) Product specification requirements. Category small medium and large large specifications (g / only) 500 ~ 600600 ~ 750750 ~ 10001000 or more (four) product quality requirements. The first-level, second-level and third-level vitality actions of the project are lively and powerful. The agile parasites should not detect the smell. The live turtle has the inherent fresh and astringent taste, no odorous back, no scalp, no scars, few scars, less scars, body weight and body height ratio. (g/mm) ≥ 22.6 ≥ 22 ≥ 21.4 (five) quality characteristics. 1. Sensory features: body-shaped ellipse, 8 pairs of ribbed bones are obvious, the front is narrow and wide, the body is large, the skirt is large and thick, the carapace is yellow or brown, and the plastron is yellowish. 2. Physical and chemical indicators: protein ≥ 16%, fat ≤ 0.7%, amino acid ≥ 14%.

Apply to：
Producers within the scope of protection of the Dingma turtle's geographical indication products may apply to the Linqing Quality and Technical Supervision Bureau of Shandong Province for the use of the “Special Mark for Geographical Indication Products”, which shall be approved by the General Administration of Quality Supervision, Inspection and Quarantine.