When the concubine of Emperor Jing of the Han Dynasty came to have her period, she arranged for the maids around her to sleep with her, and an idiom was born.
Legend of the Anti-Japanese Alliance: The anti-Japanese team used cluster grenades to deal with the Japanese Kwantung Army that came to encircle and suppress them
The founding empress of the Liao Kingdom, Shu Luping, cut off her arm and forced her eldest son to betray her with a ruthlessness comparable to that of Wu Zetian
Discovery of armored fish from the Middle Devonian 390 million years ago; progress in research on flexible thick-film organic solar cells; progress in calculation of three-dimensional depth reservoirs