Because when he came to visit in a country that he did not know when he has problems, we should help, such as when a tourist comes to question the way we should be helping him by introducing how to suggest nearby attractions.
Because when he visited the country in which he is not familiar when he has a problem we should help, such as when a tourist asked us to help him by way of introduction to, or recommend places to visit nearby.
Because when he visited the country he unfamiliar when he has a problem we should help, such as when the tourists ask the way we should help him by introducing how to go or to introduce tourist attractions in the vicinity of