Àihuī Tiáoyuē shì zài Hēilóngjiāng biān de Àihuī qiāndìng de.
The Treaty of Aigun was signed at Aihui on the Heilongjiang River.
Tips
history
Not used alone in modern Chinese. As huī it survives in the place name 瑷珲 (now Heihe), site of the 1858 Treaty of Aigun; an older reading hún means 'fine jade', fitting its jade radical.
register
Onomastic and classical only — found in the historical place name and old texts, not in everyday language.