Kèshānbìng zuì zǎo jiùshì zài Kèshān Xiàn bèi fāxiàn de.
Keshan disease was first discovered in Keshan County.
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history
Keshan County (克山县) in Qiqihar, Heilongjiang, gave its name to Keshan disease (克山病) — a selenium-deficiency cardiomyopathy first described in local outbreaks in 1935. The discovery led to nationwide selenium fortification programs.