He is visiting someone.

他正在拜访某人。

youdao

It is better to telephone before visiting someone at home.

拜访别人家之前最好先打个电话。

youdao

How often do you put off visiting someone because they are too far away, or because you have too much to do at home? Quality time with your loved ones is important for a happy life.

多少次你因距离遥远，或是家中忙不完的琐事，而推迟了拜访的约定？常和你爱的人在一起是快乐生活的重要一部分。

youdao

Miz Lisagore says it is important for travelers to realize that they are visiting a place that is someone's home.

VOA: special.2009.04.22

But if you're visiting someone after 18:00, you stay with your host rather than venture back out - a sense of caution is hanging over Damascus.

BBC: Syria crisis: Daily life during Damascus blackout

It added the captain believed the crew had been interrupted pre-flight by someone visiting the flight deck, which had distracted them.

BBC: Essex

You walk from room to room like someone visiting a deserted town.

NEWYORKER: Miracle Polish