What time the first bus actually leave from Jiaozuo railway station to Yuntaishan?

I'll be there in JZ railway station at 4AM and I need to know What time the first bus actually leave from JZ Railway Station to Yuntaishan? Alternatively can I find a trustworthy taxi early morning outside the railway station to take me to Yuntaishan? If there is any taxi, how much do they charge roughly?

I appreciate your answer