Translation of "Firstly" in Chinese

Firstly, let's check the attendance.

首先，我们检查出勤情况。

Firstly, happiness is related to money.

首先，幸福跟钱有关系。

We are firstly going to Beijing.

我們先去北京。

Firstly, I think that the first time each foreigner is in China, the earliest impression is certainly the size of the country.

首先，我认为每个外国人第一次在中国的时候，最初的印象一定是国家的大小。