Hunchun city, a county-level city in Jilin province near the border with Russia and North Korea

Hunchun, a county-level city in Jilin province within the [[延边朝鲜族自治州|延邊朝鮮族自治州|yan2 bian1 chao2 xian3 zu2 zi4 zhi4 zhou1]]

Aihui District of Heihe, a prefecture-level city in Heilongjiang Province

An 1858 unequal treaty forced on Qing China by Tsarist Russia, which ceded a vast territory north of the Heilongjiang River and established joint control over the area east of the Ussuri River.