"Pioneer traveler" or "First batch of travelers" is the commonly used expression in Engpsh to refer to the first group of people who embark on a journey.

This phrase is a compound noun made up of two nouns, "pioneer" and "traveler," which are put together to describe a person who is among the first to travel to a new place. "Pioneer" refers to a person who is the first to do something, especially in exploring new territory or estabpshing settlements, while "traveler" refers to a person who is travepng, especially for pleasure.

Here are a few examples of the use of the phrase in Engpsh:

The pioneer travelers to the newly discovered island were greeted by the friendly natives.

The first batch of travelers on the newly-opened scenic route were in for a treat with breathtaking views.

Translated to Chinese, the above examples would be:

新发现的岛屿的先驱旅行者受到了友好的土著居民的欢迎。

新开放的风景旅游线路的首批旅行者将享受到令人惊叹的景观。