- 护航舰 hùhángjiàn escort vessel
- 保驾护航 bǎojiàhùháng safeguardto provide protection and support for something to ensure its smooth progress or safety
- 绿坝·花季护航 Lǜbà· Huājì Hùháng Green DamGreen Dam Youth Escort, Internet content-control software, in use during 2009-2010 (abbreviated to [[绿坝|綠壩|Lu:4 ba4]])