What are the earliest express trains from Zhuanghe to Dalian?

The earliest train from Zhuanghe to Dalian (it should be a fast passenger, because the whole journey takes the expressway) leaves at 5: 30 in the morning, at the gate of the passenger station.

However, if you take this bus, you must arrive ahead of time. If you are late, there will be no seat. The reason is that Zhuanghe people have a long journey to Dalian on business. Take this bus, you will arrive in Dalian just before and after work, and you will return to Zhuanghe in the afternoon, so there are many people taking this bus.