Xǔ Dòng 許洞 (Sòng), zì Dòngfū 洞夫, was a Northern Sòng official and military-strategy writer of Wúxiàn 吳縣 (Sūzhōu region). Jìnshì of Xiánpíng 3 (1000). Author of the Hǔ qián jīng 虎鈐經 (KR3b0013, the comprehensive 20-juan military treatise of his Sòng generation, completed 1000), the principal post-Táng predecessor to the Wǔ jīng zǒng yào (KR3b0012).