The Dragon Boat Festival also known as Duan Yang Festival,Double Fifth Festival and Tianzhong Festival is Chinese traditional festival.It is a collection of worship, ancestor worship, prayer to ward off bad luck celebrating entertainment and diet.There is a legend about an ancient Chinese poet named Qu Yuan, suicide on that day.After that day,it became to memorize Qu Yuan.While there are other legends that were told to memorize Wuzixu,Cao e or Jiezitui.
There are many traditional customs of the Dragon Boat Festival, such as dragon boat racing, drinking realgar wine which are widely spread.But having zongzi is a deep-rooted custom for every chinese.
Zongzi which also alias “Angle millet” and “tube reed” has rich variety.In the north of China,the northerns usually package zongzi with jujube. It means “Early” in Chines,people make wishes that their children could get high score early.In the south, the southerns usually package zongzi with bean, Schweinefleisch, chestnut , ham, eggs and so on.
Generally, the Dragon Boat Festival is rushing in May and June.Most parts of China have entered the state of early summer, temperature roses and fresh corruption rate will be intensified.How to ensure the freshness of zongzi, the process from the production to the meal table is important.
It is necessary to ensure the cold chain of the whole logistics link from raw materials to steamed Zongzi including storage under refrigerated conditions.
The process cannot be separated from the development of cold chain technology, it is also be achieved through cold chain packaging.It should be noted that the vacuum-packed zongzi should be refrigerated when the temperature exceeds 25℃.Under atmosphere temperature, zongzi’s shelf life will be in 5 days.And it will become 10 days between 0-4℃.It can also be up to 12 months when stored under -18℃.The damage to the quality of zongzi after the cold chain break is irreversible.It should be ensured that every process could hold at an appropriate low temperature.It also requires long-term and stable cold chain packaging.
