悬案 xuán'àn unsettled case Definitions Defs Origin Strokes Stroke Words Sentences Sents 中苏解决悬案大纲协定 zhōngsūjiějuéxuán'àndàgāngxiédìng Sino-Soviet Treaty of 1923 The agreement signed in 1923 normalizing diplomatic relations between the Soviet Union and the Beiyang government of China
