He works until midnight every day before going to bed.
Tips
culture
三更 is the middle of the five night watches (更) of old China, the deepest part of the night. The watches are gone, but the word lives on in 半夜三更 and 三更半夜, both 'in the dead of night'.
mistakes
更 is gēng here, the night watch, not gèng 'more'. Watchmen marked each watch by striking a clapper, which is 打更.
