凌晨 (líng chén): rất sớm vào buổi sáng

In order to catch the 6 a.m. flight, she got up at 4 a.m. to pack her luggage.

The streets in the early morning are very quiet, with only a few cleaners sweeping.

He often works until the early morning, and he is always tired when going to work the next day.

At 3 a.m., a seriously ill patient was suddenly brought to the hospital emergency room.