The story
- Mandarin · borrowed from虹口
- English todayHongkou
The atonal Hanyu Pinyin romanization of the Mandarin 虹口 (Hóngkǒu, literally “Rainbow Mouth”), a variation of earlier 洪口 (Hóngkǒu, literally “Flood Mouth”).
Etymology from Wiktionary, CC BY-SA 4.0.