lì / shǐ / xué / jiā / zhèng / zài / yán / jiū / dāng / shí / qīn / rì / pài / de / zhèng / zhì / lì / chǎng

历史学家正在研究当时亲日派的政治立场。

Historians are studying the political stance of the Japanophile faction at that time.