So easy. Just take a train from Dezhou Railway Station to Taishan Railway Station (in Tai’an City). There are 20 trains from Dezhou to Taishan within a day. Among those, D198 and D33 are bullet trains. By bullet train, it takes about one hour and a half to get to Taishan. By other trains, it takes about 2 hours and a half. After you arrive at Taishan Railway Station, there are buses to take you to get to the Mt. Taishan.