Refers to blood shed for a righteous cause or, metaphorically, to profound sincerity, unwavering loyalty, and integrity so strong it has an enduring, precious quality. It implies that true devotion or sacrifice leaves a lasting legacy.
他一生为理想奋斗，即使身陷困境，也坚守信念，其精神可说是血化为碧。
He dedicated his life to his ideals, and even when facing adversity, he held firm to his beliefs; his unwavering spirit can be said to have turned into jade.
Era:
Ancient
Frequency:
Synonym:
Story:
During the Zhou Dynasty, Chang Hong, a high official under Duke Liu Wengong, was known for his lifelong loyalty to the court, his unwavering integrity, and his noble spirit.
Due to his uprightness, he offended powerful figures at court and was unjustly executed by the Zhou people.
Legend has it that at the time of his death, some admirers collected his blood and stored it.
Three years later, these dried blood clots all transformed into jade.
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