Buses between Songjianghe and Erdaobaihe

Hey! I am planning on travelling to Changbaishan during mid-autumn festival weekend. I will be arriving to Songjianghe by train on the Saturday morning, but I want to go to Erdaobaihe in the same afternoon after I am done with exploring the western slope. I saw that there is a train to Baihe around 9pm but I think that's quite late. Are there any busses leaving from western slope/Songjianghe to Erdaobaihe earlier? (Where can I find information on departure times?) Or alternatively, how much would a taxi to Erdaobaihe cost?