Original sentence: On 15 October, 1990, at ninety years of age, he died at the Běijīng Sānlĭ Hénán Shāgōu Yùsuŏ (北京三里河南沙溝寓所)
Edited sentence: On 15 October, 1990, at ninety years of age, he passed away at the Běijīng Sānlĭ Hénán Shāgōu Yùsuŏ (北京三里河南沙溝寓所)