西学 refers to the influx of Western science, technology, and political thought into China from the late Ming through the Qing dynasty. The famous slogan
中学为体,
西学为用 (zhōngxué wéi tǐ, Xīxué wéi yòng — 'Chinese learning as substance, Western learning for application') was coined by Zhang Zhidong (
张之洞) during the Self-Strengthening Movement (
洋务运动).