連天

reaching the sky / for days on end / incessantly

surname Lian

to link / to join / to connect / continuously / in succession / including / (used with 也[ye3], 都[dou1] etc) even / company (military)

day / sky / heaven

cannon firing for days on end (idiom); enveloped in the flames of war

to whine on for days (idiom) / to endlessly grumble complaints / incessant whining