June 21 is Xiazhi, or the summer solstice, the 10th of the 24 solar terms on the Chinese lunar calendar. On this day, the Northern Hemisphere sees the longest day and the shortest night of the year. It is also the hottest time of the year, as summer is at its peak.
Designers: Xing Cheng, Zhang Tao
Editor: Chen Bo
Producer: Wu Haixia
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