Direct coach from Jilin to Erdaobaihe?

An article on this site mentioned a coach from Jilin city to Erdaobaihe.

This seems like a more streamlined/easier way to get to Erdaobaihe than catching a train to Antu, then bus to Erdaobaihe. But I cannot find any more info on this coach anywhere.

So a I have a few questions regarding this coach:

Where would this leave from in Jilin?
How long would it cost?
How long is the journey?
Would I have to book in advance and from where?
Would it run in late February/early March?