Carrying heavy luggage on the back, walked a long way.
Tips
usage
Note the two pronunciations: bēi zhe (carrying physically on one's back) vs bèi zhe (behind someone's back, secretly). 背着我 can mean either 'carrying me on their back' (bēi zhe wǒ) or 'behind my back' (bèi zhe wǒ) — tone matters!