how do i travel from Tanggu to Huanghua?

Hi, you may take bus at Tanggu Long-distance Bus Station to Huanghua. I have checked the schedule online and I found that the buses are available at 07:40, 08:25, 09:00, 10:35, 11:00, 12:40, 11:45, 13:30 and 14:20. However, this information is only for your reference and you'd better check it with the local station. Hope it is helpful.

how much is that if i take bus?

The bus fare is around CNY30 per person.