Diūfāntúfāngchéng
ㄉㄧㄡ ㄈㄢ ㄊㄨˊ ㄈㄤ ㄔㄥˊ
Simplified 丢番图方程
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 丟番圖方程 and it comes back until you know it.