The story
From Matteo Ricci's romanization of the Nanjing Mandarin pronunciation of 揚子江 /扬子江 (Yángzǐ Jiāng) before the palatalization of [k] to [t͡ɕ]
Etymology from Wiktionary, CC BY-SA 4.0.
Iansuchian
Today it means: The Yangtze River. Full definition →