1. Demand Analysis Nowadays, fruit tree scientists at home and abroad generally believe that jujube is an important fruit tree resource worthy of research and development in the future. In the 21st century, whether cultivated Chinese jujube can be popular in the world, the key lies in solving the long-term storage and preservation of jujube. China's specialty fresh jujube peel bright and bright, beautiful appearance; sweet and palatable flesh, nutritious. Fresh dates contain vitamin C3OO-800 mg per 100 grams of flesh. A person can consume 1-3 fresh dates each day to obtain vitamin C needed for metabolism. In recent years, some fresh dates with excellent quality have become popular in the market. For example, the retail price of fresh “fresh dates†in Beijing and Tianjin around New Year’s Day is as high as RMB 100 per kilogram. However, because the problem of long-term preservation and preservation of jujube has not been well resolved, and the annual supply of fresh jujube cannot be achieved, the huge potential market for fresh jujube at home and abroad has not yet been fully exploited, which severely restricts the production of jujube in China and more than a dozen. The provinces and cities Zao District rural economic development. At present, China has an annual output of about 1.5 million tons of jujube, more than 90% of which is used to make dried jujube, and thus loses about 6,000 tons of vitamin C every year. These vitamin C can meet the needs of 300 million people a year, worth more than 1.2 billion yuan. Development and application of long-term preservation of new technologies, for people throughout the year to provide good health and good quality fresh dates, the Chinese specialty fresh dates are sold throughout the world, can greatly increase the added value of jujube. 2. Technical Analysis Fresh jujube contains many sugars, strong metabolism, and easy to lose water. It belongs to the non-respiratory transitional type fruit and is difficult to store. It is stored using traditional cold storage techniques and modified atmosphere methods, and generally can only be kept fresh for 2 months. Recently, through laboratory research, it has been found that some jujubes can be stored for more than 12 months under low temperature conditions after being properly frozen. More than two years of research have proven that frozen storage inhibits the life metabolic activities of jujube, reduces water loss, and can preserve fruit nutrients and fresh food flavors for a long time. After a long-term frozen storage of the jujube, the fruit is still plump, bright in color and crisp and sweet. Fruit water and sugar preservation rate exceed 95%, vitamin C preservation rate of 89%, decay rate of less than 1%. The core technologies of jujube long-term frozen preservation and storage include frozen jujube processing, cryopreservation of frozen jujube and thawing method in three parts. Laboratory research results show that the use of existing food freezers, low temperature cold storage and refrigerators can meet the requirements of this core technical requirement. The upstream technologies supporting the core technologies include fruit harvesting, transportation, storage, cleaning, pre-cooling, and downstream technologies such as packaging, transportation, and sales of frozen foods. These supporting technologies have basically matured. China has now built a low-temperature cold storage with a total capacity of millions of tons, can design and produce various types of food quick-freezing machines, and has already begun to produce cold storage systems for frozen food production, storage, transportation and sales in large and medium-sized cities. , fully equipped with the conditions of industrialization and application of this technology for long-term preservation and storage of jujube. This core technology has already applied for national patents on June 5, 1998 and has its own intellectual property rights. Its characteristic is that it does not use any chemical substance or radioactive radiation to treat fruit, it is safe to use, does not pollute the environment; the second is very suitable for industrial production, it is easy to transform and popularize, and it can produce very good scale benefits in the short term. 3. Economic Analysis After this technology has been developed, assembled, integrated, and applied in large-scale industrialization, it can produce very significant social and economic benefits. Jujube can generally add 20%-300% after storage. Preservation of fresh jujube has good market prospects. First, the nutritional value of fresh jujube is high, and the second is the good fortune of jujube. In recent years, domestic and short-term storage of high-quality "winter jujube", "lizi dates." "Suiping jujube" is in short supply year after year, and the retail price has remained high. In the next 5-10 years, with research and development, the total annual demand for fresh dates in domestic and foreign markets is estimated to exceed 500,000 tons. At that time, it will require long-term preservation of 417,000 tons of jujube.