汨罗江

On the fifth day of the fifth lunar month in 278 BCE, the exiled poet-statesman Qu Yuan (屈原 Qū Yuán) drowned himself in the Miluo in despair over the fall of his home state of Chu. Locals supposedly raced boats out to recover his body and threw rice dumplings into the water to keep fish from eating him — the origins, in popular tradition, of dragon-boat racing and 粽子 (zòngzi) at the Duanwu Festival (端午节).

The first character is 汨 (mì) — three strokes plus 日 — not the very similar 汩 (gǔ, gushing). Even native speakers often write the wrong one; if you see it spelled 汩罗江 in casual writing, it's a typo.