give me an explanation!

for the next half a month, zhao xu also got on the train back to his hometown. the two wheels were like the shadow of the setting sun as it dragged away from his hometown.

Before he left, he glanced at the last afterglow of the city and entered the carriage without looking back.

Sometimes, one's last look would happen inadvertently, and no one would know that it was the final farewell.

inside the train, zhao xu looked at the other students who were also on their way to school. other than the reluctance to leave home at the start, everyone was also excited to be able to return to school and meet a familiar classmate.

Throughout the whole process, he looked out of the window in silence, like a lonely passerby, passing the time.