Core Insights - The northeastern region of China, previously considered a "blank area" for crayfish farming, is now successfully cultivating high-altitude crayfish in Heilongjiang's Heihe City, with plans to distribute them nationwide [1] Group 1: Crayfish Farming Development - The farming base in Heihe has released 1.4 million high-altitude crayfish seedlings this year, expecting a total yield of over 20 tons [1] - The initial attempts to farm crayfish faced high mortality rates, with losses reaching 70% to 80% shortly after introduction to local ponds [1] Group 2: Research and Adaptation - The operator of the farming base conducted three years of trials to identify the most suitable crayfish seedlings for the local environment, ultimately selecting the "water flower seedlings" [2][3] - The first batch of successfully surviving seedlings was introduced into the farming pools in 2024 [3] Group 3: Expansion and Technology - The initial catch was less than two tons but sold out quickly, prompting the operator to expand the farming scale and cultivate locally adapted seedlings [4] - To enhance production, the operator improved farming techniques by installing an automated control system in greenhouses to manage temperature, light, and oxygen levels, extending the harvesting season from late July to December [5]