Date: May. 21th-23th, 2021　　Location: Qingdao Hongdao International Convention and Exhibition Center

On December 8, the United Kingdom became the first country in the world to begin vaccinating citizens with Pfizer's fully approved and vetted COVID-19 vaccine.

In many people’s perceptions, they are the same and both can be used to refrigerate items, but they don’t know that it is this cognition that leads to some wrong storage.